$125\cdot7$

$9a^5b-7a^5+8a^5b-6a^5b$

$\frac{x^2+13x+40}{x^2-2x-35}$

$\lim_{x\to\infty}\left(\left(x+5\right)^{\left(\frac{1}{\left(x+5\right)}\right)}\right)$

$mn\sqrt{88m^{15}n^{14}}$

$\frac{5}{\sqrt[3]{x}}+1$

$\left(5^{\frac{2}{3}}\right)\left(9x^6+4x^{\frac{1}{5}}-x^{\frac{1}{2}}\right)$