This document discusses combining like terms in algebra and provides an example. It notes that a common mistake is combining terms that seem alike but are not, such as those with and without exponents. The correct way is to combine only terms that are alike, for instance -6a and -4a into -10a, but not -6a^2 and -4a. An example problem shows combining the like terms 6a - 2a, -5, -4, and -7 into the simplified expression 4a - 16.