Find the least common denominator for the following rational expressions?

Question

(x+2)/(x^2-1) , (x+2)/(x^2+2x+1) , (x+2)/(x+1)

Answer 1

(x+1)(x+1)(x-1)

the denom for the first eqn is (x+1)(x-1)
for the second its (x+1)(x+1)
for the third its (x+1)

the simplest way to make them all equal is to make them all
(x+1)^2 (x-1)

Answer 2

(x-1)(x+1)^2

Answer 3

(x+1) (x+1)(x-1)