Answer
$x^{21}$
Work Step by Step
When dividing exponential expressions with the same non-zero base, subtract the exponent of the denominator from the exponent of the numerator:
$$\frac{x^{14}}{x^{(-7)}}$$
$$=x^{(14-(-7))}$$
$$=x^{(14+7)}$$
$$=x^{21}$$
