#PowerShell mathematical calculations

http://blogs.technet.com/heyscriptingguy/archive/2010/03/06/hey-scripting-guy-march-6-2010.aspx

The key to unlocking the ability of Windows PowerShell to create useful formulas is to leverage the static methods from the system.math class. You can easily see them by using the Get-Member cmdlet, as shown here:

PS C:\> [math] | Get-Member -Static | Format-Table name, membertype -AutoSize

Name            MemberType
—-            ———-
Abs                 Method
Acos                Method
Asin                Method
Atan                Method
Atan2               Method
BigMul              Method
Ceiling             Method
Cos                 Method
Cosh                Method
DivRem              Method
Equals              Method
Exp                 Method
Floor               Method
IEEERemainder       Method
Log                 Method
Log10               Method
Max                 Method
Min                 Method
Pow                 Method
ReferenceEquals     Method
Round               Method
Sign                Method
Sin                 Method
Sinh                Method
Sqrt                Method
Tan                 Method
Tanh                Method
Truncate            Method
E                 Property
PI                Property

Windows 2008 (R2) AD Cmdlets in #PowerShell

Cmdlet Description
Add-ADComputerServiceAccount Adds one or more service accounts to an Active Directory computer.
Add-ADDomainControllerPasswordReplicationPolicy Adds users, computers, and groups to the Allowed List or the Denied List of the read-only domain controller (RODC) Password Replication Policy (PRP).
Add-ADFineGrainedPasswordPolicySubject Applies a fine-grained password policy to one more users and groups.
Add-ADGroupMember Adds one or more members to an Active Directory group.
Add-ADPrincipalGroupMembership Adds a member to one or more Active Directory groups.
Clear-ADAccountExpiration Clears the expiration date for an Active Directory account.
Disable-ADAccount Disables an Active Directory account.
Disable-ADOptionalFeature Disables an Active Directory optional feature.
Enable-ADAccount Enables an Active Directory account.
Enable-ADOptionalFeature Enables an Active Directory optional feature.
Get-ADAccountAuthorizationGroup Gets the Active Directory security groups that contain an account.
Get-ADAccountResultantPasswordReplicationPolicy Gets the resultant password replication policy for an Active Directory account.
Get-ADComputer Gets one or more Active Directory computers.
Get-ADComputerServiceAccount Gets the service accounts that are hosted by an Active Directory computer.
Get-ADDefaultDomainPasswordPolicy Gets the default password policy for an Active Directory domain.
Get-ADDomain Gets an Active Directory domain.
Get-ADDomainController Gets one or more Active Directory domain controllers, based on discoverable services criteria, search parameters, or by providing a domain controller identifier, such as the NetBIOS name.
Get-ADDomainControllerPasswordReplicationPolicy Gets the members of the Allowed List or the Denied List of the RODC PRP.
Get-ADDomainControllerPasswordReplicationPolicyUsage Gets the resultant password policy of the specified ADAccount on the specified RODC.
Get-ADFineGrainedPasswordPolicy Gets one or more Active Directory fine-grained password policies.
Get-ADFineGrainedPasswordPolicySubject Gets the users and groups to which a fine-grained password policy is applied.
Get-ADForest Gets an Active Directory forest.
Get-ADGroup Gets one or more Active Directory groups.
Get-ADGroupMember Gets the members of an Active Directory group.
Get-ADObject Gets one or more Active Directory objects.
Get-ADOptionalFeature Gets one or more Active Directory optional features.
Get-ADOrganizationalUnit Gets one or more Active Directory OUs.
Get-ADPrincipalGroupMembership Gets the Active Directory groups that have a specified user, computer, or group.
Get-ADRootDSE Gets the root of a domain controller information tree.
Get-ADServiceAccount Gets one or more Active Directory service accounts.
Get-ADUser Gets one or more Active Directory users.
Get-ADUserResultantPasswordPolicy Gets the resultant password policy for a user.
Install-ADServiceAccount Installs an Active Directory service account on a computer.
Move-ADDirectoryServer Moves a domain controller in AD DS to a new site.
Move-ADDirectoryServerOperationMasterRole Moves operation master (also known as flexible single master operations or FSMO) roles to an Active Directory domain controller.
Move-ADObject Moves an Active Directory object or a container of objects to a different container or domain.
New-ADComputer Creates a new Active Directory computer.
New-ADFineGrainedPasswordPolicy Creates a new Active Directory fine-grained password policy.
New-ADGroup Creates an Active Directory group.
New-ADObject Creates an Active Directory object.
New-ADOrganizationalUnit Creates a new Active Directory OU.
New-ADServiceAccount Creates a new Active Directory service account.
New-ADUser Creates a new Active Directory user.
Remove-ADComputer Removes an Active Directory computer.
Remove-ADComputerServiceAccount Removes one or more service accounts from a computer.
Remove-ADDomainControllerPasswordReplicationPolicy Removes users, computers, and groups from the Allowed List or the Denied List of the RODC PRP.
Remove-ADFineGrainedPasswordPolicy Removes an Active Directory fine-grained password policy.
Remove-ADFineGrainedPasswordPolicySubject Removes one or more users from a fine-grained password policy.
Remove-ADGroup Removes an Active Directory group.
Remove-ADGroupMember Removes one or more members from an Active Directory group.
Remove-ADObject Removes an Active Directory object.
Remove-ADOrganizationalUnit Removes an Active Directory OU.
Remove-ADPrincipalGroupMembership Removes a member from one or more Active Directory groups.
Remove-ADServiceAccount Removes an Active Directory service account.
Remove-ADUser Removes an Active Directory user.
Rename-ADObject Changes the name of an Active Directory object.
Reset-ADServiceAccountPassword Resets the service account password for a computer.
Restore-ADObject Restores an Active Directory object.
Search-ADAccount Gets Active Directory user, computer, and service accounts.
Set-ADAccountControl Modifies user account control (UAC) values for an Active Directory account.
Set-ADAccountExpiration Sets the expiration date for an Active Directory account.
Set-ADAccountPassword Modifies the password of an Active Directory account.
Set-ADComputer Modifies an Active Directory computer.
Set-ADDefaultDomainPasswordPolicy Modifies the default password policy for an Active Directory domain.
Set-ADDomain Modifies an Active Directory domain.
Set-ADDomainMode Sets the domain functional level for an Active Directory domain.
Set-ADFineGrainedPasswordPolicy Modifies an Active Directory fine-grained password policy.
Set-ADForest Modifies an Active Directory forest.
Set-ADForestMode Sets the forest mode for an Active Directory forest.
Set-ADGroup Modifies an Active Directory group.
Set-ADObject Modifies an Active Directory object.
Set-ADOrganizationalUnit Modifies an Active Directory OU.
Set-ADServiceAccount Modifies an Active Directory service account.
Set-ADUser Modifies an Active Directory user.
Uninstall-ADServiceAccount Uninstalls an Active Directory service account from a computer.
Unlock-ADAccount Unlocks an Active Directory account.

 

http://technet.microsoft.com/en-us/library/ee617195.aspx