Function: sum(invert(gradient[2](tan(numbers('xyy')))), gradient[2](tan(numbers('xyy')))) if sum(sum(invert(gradient[2](tan(numbers('xyy')))), gradient[2](tan(numbers('xyy')))), invert(gradient[2](tan(numbers('xyy'))))) > gradient[2](tan(numbers('xyy'))) else invert(gradient[2](tan(numbers('xyy'))))
