<?php
$string = "Mais de - valor: R$3.21 - Tipo: (+05)";
preg_match('/^([^-]+)[^\(]+(\([^\)]+\))/', $string, $match); echo $match[1].$match[2];
PD9waHAKCiRzdHJpbmcgPSAiTWFpcyBkZSAtIHZhbG9yOiBSJDMuMjEgLSBUaXBvOiAoKzA1KSI7CnByZWdfbWF0Y2goJy9eKFteLV0rKVteXChdKyhcKFteXCldK1wpKS8nLCAkc3RyaW5nLCAkbWF0Y2gpOwplY2hvICRtYXRjaFsxXS4kbWF0Y2hbMl07