Y mul c mul pow x2 c mul add mul add c sqrt cos x2 cos add x1 mul c pow x1 c mul c mul add x1 add mul x1 sqrt cos x2 mul x2 sqrt x1 sin add x1 mul c pow x1 c mul add x1 add mul x1 sqrt cos x2 mul x2 sqrt x1 cos add x1 mul c pow x1 c