Y mul div c c mul pow x1 c mul add c pow tan mul div c c mul pow x1 c add x2 add x1 mul x2 mul x1 add sqrt x2 cos sqrt x1 c mul add c add mul c mul x1 cos sqrt x1 mul c mul x1 sqrt x2 cos tan mul div c c mul pow x1 c add x2 add x1 mul x2 mul x1 add sqrt x2 cos sqrt x1