when do simple parenthetical grouping matter in PowerShell code?

When do simple parenthetical grouping matter in PowerShell code?

Here's one example when using parenthesis matters (thanks to Boe Prox for inspiring this example):

<#c:#> 'abc' >xo<#c:#> gc xo | set-content xo
set-content : The process cannot access the file 'C:\users\larry\documents\windowspowershell\xo' because it is b
used by another process.
At line:1 char:9+ gc xo | set-content xo+         ~~~~~~~~~~~~~~+ CategoryInfo          : NotSpecified: (:) [Set-Content], IOException+ FullyQualifiedErrorId : System.IO.IOException,Microsoft.PowerShell.Commands.SetContentCommand<#c:#> 'abc' >xo<#c:#> (gc xo) | set-content xo<#c:#> type xo
abc

Here's an example of arithmetic expression evaluation and added parenthesis

<#c:#> 10*100+1000
2000<#c:#> 10*(100+1000)
11000<#c:#>

Are there other coding examples using PowerShell where adding parenthesis changes the semantics of a statement?