Question

help me out to solve this problem

Answer 1

${4}^{ - 3 + 5} \times {a}^{ - 5 + 8} \times {b}^{ - 4 - 3}$
${4}^{2} \times {a}^{3} \times {b}^{ - 7}$

Answer 2

dont mind hand writing
may be this can help you