Plot[{0.0198117 + 0.00826611 x + 0.0521381 x^2 - 0.00210184 x^3, -0,181324 + 1,09073 x - 1,77627 x^2 + 0,920407 x^3, -0,0335189 + 0,265863 x - 0,359457 x^2 + 0.147228 x^3}, {x, 0, 1.0333}]