In this section we will simplify complex rational expressions, which are rational expressions with rational expressions in the numerator or denominator. Then we multiplied the first rational expressio...In this section we will simplify complex rational expressions, which are rational expressions with rational expressions in the numerator or denominator. Then we multiplied the first rational expression by the reciprocal of the second, just like we do when we divide two fractions. Subtract the rational expressions in the numerator and add in the denominator. A complex rational expression is a rational expression in which the numerator or denominator contains a rational expression.