PowerShell Add Printers Script

$PrinterNumber = '6'
$AddPortCommand = 'Add-PrinterPort -Name "C:\pdf\test-print-pdf'+$PrinterNumber+'.pdf"'
$AddPrinterCommand = 'Add-Printer -Name "TEST-PRINT-PDF'+$PrinterNumber+'" -DriverName "Microsoft Print to PDF" -PortName "C:\pdf\test-print-pdf'+$PrinterNumber+'.pdf"'
Invoke-Expression $AddPortCommand
Invoke-Expression $AddPrinterCommand