To improve readability, you can break PowerShell lines into separate lines.
Get-Service | Where-Object { $_.Status -eq 'Running' } Get-Service | Where-Object { $_.Status -eq 'Running' }
After a pipeline symbol, you can always add a line break. You can also add line breaks safely after an opening brace, and before a closing brace:
Get-Service | Where-Object { $_.Status -eq 'Running' }
If you want to break a line someplace else, add a backtick character before the line break:
Get-Service | Where-Object ` { $_.Status -eq 'Running' }