Find the coefficient of `x^(4)` in the expansion of `(1-4x)^(-3//5)`.

Find the coefficient of x^(6) in the expansion of (1-3x)^((-2)/(5))

Find the coefficient of x^4 in the expansion of (1-x^2)^n

Find the coefficients of x^4 in the expansion of (1+x+x^2)^3

Find the coefficient of x^-3 in the expansion of (x -1/(2x))^5

Find the coefficient of x^4 in the expansion of (1+x+x^2+x^3)^6

Find the coefficient of : (i) x^3 in the expansion of (1 - x)^(-1/4) (ii) x^2 in the expansion of (5 - 3x)^(-1/3)

Find the coefficient of x^(3) in the expansion of ((1+3x^(2))^((3)/(2)))/((3+4x)^((1)/(3)))

Find the coefficient of x^(13) in the expansion of (1-x)^(5)xx(1+x+x^(2)+x^(2))^(4)