How to find the sum of all coefficients in the any expansion .

Find the sum of all the coefficients in the binomial expansion of (x^(2)+x-3)^(319)

What is the sum of all the coefficients in the expansion of (1+x)^(n) ?

What is the sum of the binomial coefficients in the expansion of (1+x)^(50)

If the sum of all the coefficients in the expansion of (3x-2y+2z)^(n) is 729, then the value of "n" is

Find the sum of the last 30 coefficients in the expansion of (1+x)^(59), when expanded in ascending powers of x.

Suppose the sum of the coefficients in the expansion of (1 - 5x + 12x^(3))^(n) is a and the sum of the coefficients in the expansion of (1 - 2x + 3x^(2))^n is b. If a = b^(m) , then m = ___

If the sum of the coefficients in the expansion of (b + c)^(20) {1 +(a -2) x}^(20) is equal to square of the sum of the coefficients in the expansion of [2 bcx - (b + c)y]^(10) , where a, b, c are positive constants, then