Answer
a) $\frac{1}{x^2}$
b) $\frac{1}{w}$
c) $x^6$
Work Step by Step
a) $x^{-5}$$x^3$ = $x^{-5+3}$ = $x^-2$ = $\frac{1}{x^2}$
b) $w^{-2}$$w^{-4}$$w^{5}$ = $w^{-2-4+5}$ = $w^{-1}$ = $\frac{1}{w}$
c) $\frac{x^{16}}{x^{10}}$ = $x^{16-10}$ = $x^{6}$