Use the Law of Exponents to Rewrite and Simplify the Expression

Use the Law of Exponents to rewrite and simplify the expression. $\frac{x^{4 x} \cdot x^{5 x+1}}{x^{x-5}}$

A) $x^{8 x+6}$
B) $x^{8 x+7}$
C) $x^{6 x-10}$
D) $x^{3 x+9}$
E) $x^{4 \pi-8}$