1) The document contains notes from a math lesson on simplifying mixed expressions, rational expressions, and complex fractions. Assignments include lesson problems due tomorrow, a chapter test on Tuesday, and a final exam on Thursday. 2) A mixed expression contains the sum of a monomial and a rational expression. We can change it to a rational expression by finding the lowest common denominator. A complex fraction has one or more fractions in the numerator or denominator and can be simplified using division. 3) Examples are worked through for writing mixed expressions as rational expressions, and simplifying expressions involving fractions, monomials, polynomials, and rational expressions.