What is the coefficient of y^14 in the expansion of (x+y)^14?

What is the coefficient of xy^13 in the expansion of (x+y)^14?

What is the coefficient of x^2y^12 in the expansion of (x+y)^14?

You do not need binomial coefficients or Pascal's triangle for the first one

The first and last exponents are ONE

ah now we are talking
14C13 = 14!/[13!(14-13)!]

= 14

14C12 = 14! / [ 12!(14-12)! ]

= 14 *13 / 2

= 7*13

= 91