Function: gradient[0](2 *(numbers("xxr")) if numbers("xxr") > numbers("xxy") else numbers("per") if numbers("xxr") > numbers("xxy") if numbers("xxr") > 2 *(numbers("xxr")) else numbers("xxy") if numbers("xxr") > numbers("per") else 2 *(numbers("xxr")) else 2 *(numbers("xxr")))