Y add 67.8 mul add mul 1.9000000000000001 pow2 add 76.9 mul -2.1 mul add mul -4.98 x_1 mul 0.685 x_5 x_4 mul 8.64 x_6 sub sub mul -1.6600000000000001 x_4 sub mul -77.10000000000001 x_2 mul -63.1 x_3 mul -2.5100000000000002 x_0