How do you simplify (x^3)^5 leaving only positive exponents?

${x}^{15}$
$\text{using the "color(blue)"law of exponents}$
•color(white)(x)(a^m)^n=a^((mn))
$\Rightarrow {\left({x}^{3}\right)}^{5} = {x}^{\left(3 \times 5\right)} = {x}^{15}$