Question

P(x;Y)=(2x-y)^(2)(x+y)^(3)(a^(2)+b^(2))^(2)

Answer 1

$\frac{d}{dx} [f(x)g(x)] = \\ f(x) \frac{d}{dx}[g(x)] + g(x) \frac{d}{dx} \\ [f(x)] \\ ((3 {x}^{2} - 6xy + 3 {y}^{2}(x + y) {}^{2} \\ + (x + y){}^{3} (2x - 2y))$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: (a {}^{2}b + b {}^{5})$