Powershell smartmatch - simple replace subset spec char for -like and -match functions

gistfile1.txt

function smartmatch{
    param(
        [string]$inputstring
    )
    if ($inputstring -match '\[') {
        $inputstring = $inputstring.replace("[","\[") 
    }
    if ($inputstring -match '\]'){
        $inputstring = $inputstring.replace("]","\]") 
    }
    if ($inputstring -match '\}'){
        $inputstring = $inputstring.replace("}","\}") 
    }
    if ($inputstring -match '\{'){
        $inputstring = $inputstring.replace("{","\{") 
    }
    if ($inputstring -match '\('){
        $inputstring = $inputstring.replace("(","\(") 
    } 
    if ($inputstring -match '\)'){
        $inputstring = $inputstring.replace(")","\)") 
    } 
    if ($inputstring -match '\+'){
        $inputstring = $inputstring.replace("{","\{") 
    } 
    if ($inputstring -match '\|'){
        $inputstring = $inputstring.replace("{","\{") 
    } 
    $inputstring
}