Fill in the powers of a and b to make the equation true: $\displaystyle{{\left({{a}}^{{-{{3}}}}{{b}}^{{2}}\right)}}^{{4}}\cdot{{\left({{a}}^{{5}}{{b}}^{{-{{3}}}}\right)}}^{{3}}={{a}}^{?}{{b}}^{?}\usepackage{cmbright}\Huge\$

Exponents may be positive, negative, or 0.