<?php $string = 'T1 - X1(1), 7 T2 - C2(-9), -15 T3 - Y2(1), 3 T5 - C2(-1), 100'; print_r(preg_split('/-\d(*SKIP)(*FAIL)|\s*[-,#\n#()]\s*/', $string, -1, PREG_SPLIT_NO_EMPTY));
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