The sum of the coefficient in the expansion of $(a+2b+c)^{11}$ is-

The coefficient of $x^2$ in expansion of the product
(2-$x^2$).($(1 + 2x + 3x^2)^6$ + $(1-1 4x^2)^6$) is :

The sum of the coefficients in the expansion of ${\left( {1 + 5x - 7{x^3}} \right)^{3165}}$ is 

The sum of coefficients of integral powers of $x$ in the binomial expansion of ${\left(1+2\sqrt{x}\right)}^{40}$ is

Coefficient of $x^ {15}$ in $(1+x+x^ {3}+x^ {4})$^ {n} is