Y add mul c mul x1 mul pow x1 c pow add mul c x1 add mul c x2 mul pow x2 c pow add x1 x2 c c mul pow x1 c mul pow x1 c mul pow add mul c x1 add mul c x2 mul pow x2 c pow add x1 x2 c c add c mul pow x2 c pow add x1 x2 c