Y add mul pow x3 c add mul x4 pow add x2 mul pow add x3 x4 c cos x4 c mul x3 mul x4 mul pow add x3 x4 c mul pow add x2 mul pow add x3 x4 c cos x4 c cos x4 mul c mul x3 add mul x4 pow x2 c add mul x3 mul x4 pow add x2 mul pow add x3 x4 c cos x4 c tan x2