$g(x)=4 x, P(y)=\frac{(1+y)^{n}}{1-y}$

The cofficient of $x^{32}$in the expansion of $( x^4 - \frac {1}{x^3})^{15}$is

The coefficient of $x^{49}$ in the product $(x-1)(x-3) \dots(x-99)$ is

$f(x)=\left(x^{2}+\frac{3}{x}\right)^{11}…………….(i)$

$g(x)=(1+p x)^{m}…………………….(ii)$