2.8.72 Power Series

Condition: decompose the function of two variables \ (f (x, y) = y \ sin 2 x+x y^{2} \) according to the Taylor formula in the vicinity of the start of the reference \ (\ left (x_ {0}; y_ {0} \ right) = (0; 0; 0; 0) \) to the second -order inclusion include inclusive.