Function: minus(gradient[2](divide(product(numbers("per"), numbers('rrr')), numbers("per"))), divide(product(numbers("per"), numbers('rrr')), numbers("per"))) if product(numbers("per"), numbers('rrr')) > divide(product(numbers("per"), numbers('rrr')), numbers("per")) else gradient[2](divide(product(numbers("per"), numbers('rrr')), numbers("per")))
