Y add -0.619 sub sub mul -0.556 x_1 mul 0.132 x_4 mul 20.0 mul add add mul 45.400000000000006 tan add -0.834 mul -5.34 x_3 mul -78.0 inv add 0.783 mul 7.0 x_1 mul 0.15 x_2 div x_0 exp add 0.045 mul 5.9 x_2