$\int\left(-3x^4\left(-x^5+5\right)^4\right)dx$

$\left(x\cdot1\right)^4$

$\left(a+\frac{3}{5}\right)\left(a-\frac{3}{5}\right)$

$\lim_{x\to25}\left(\sqrt{3x-6}\right)$

$x^4=256$

$\frac{6^3\cdot6^7}{6^4\cdot6^6}$

$\frac{\frac{3}{5}x^4+\frac{1}{10}x^3-\frac{17}{60}x^2+\frac{7}{6}x-8}{\frac{3}{2}x^2+2}$