Study the expression. What is the value of the expression when m=2 and n= –3? (4m–3n2)2 1. Apply the product of powers: 42 m–6n4 2. Substitute values for variables: (4)2(2)–6(–3)4 3. Apply the negative exponent: (4)2(?3)4 26 Complete the steps to evaluate the expression. Written as an improper fraction, the expression has a value of .