This document contains solutions to three math problems: 1) Problem H involves simplifying a fraction by collecting like terms in the numerator and denominator. 2) Problem I shows cancelling common factors from the numerator and denominator of a fraction, leaving 12/q(p+1) as the simplified expression. 3) Problem J explains cancelling common factors and collecting like terms to simplify the fraction, resulting in the answer of 8(x+1)/3 without needing to expand the brackets further.