Find ∂2f∂y∂x\frac{\partial^2 f}{\partial y \partial x}∂y∂x∂2f for f(x,y)=x2y+y3f(x, y) = x^2 y + y^3f(x,y)=x2y+y3.
2x2x2x
2y2y2y
x2x^2x2
3y23y^23y2