Descomponer una formula

[Hidek1]

podrias intentarlo asi

Código PHP:

<?php
$formula = "(SD*12/SLA)*(RSPF*3)";
$formula = preg_match('@^\((\w{2})\*(\d{2})/(\w{3})\)\*\((\w{4})\*(\d)\)$@', $formula, $matches);
print_r($matches);
?>
 

saludos!