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