expand the following binomials

Question

(2x-1)^5

(x+3y)^3

Answer 1

(2x-1)^5

32x^5 - 80x^4 + 80x^3 - 40x^2 + 10x - 1

(x+3y)^3
x^3 + 9x^2y + 27xy^2 + 27y^3