Y add mul c mul x1 mul pow x3 c pow add x1 add x2 tan add x3 x2 c add mul c mul pow x3 c mul pow add x1 add x2 tan add x3 x2 c add x1 x3 mul c mul x1 mul pow x3 c mul add x1 x3 add mul c x1 add mul c x2 mul c tan add x3 x2