e. Finding a Coefficient

D1-14 [Binomial Expansion: Find the coefficient of x^6 in (2 + x)^8]

D1-15 [Binomial Expansion: Find the coefficient of x^2 in (1 + 3x)^16]

D1-16 [Binomial Expansion: Find the coefficient of x^3 in (2 - 5x)^14]

D1-17 [Binomial Expansion: Find the coefficient of x^10 in (1-2x)^5*(2+x)^7]