$4 x ^ { 10 } - 36 \times 5 x + 81$

$\frac{d}{dx}\left(\sqrt[4]{\frac{x}{7x+1}}\right)$

$\log\left(x\right)+\log\left(2\right)-\log\left(3\right)$

$\int\frac{x+5}{x^2+x-2}xdx$

$2x^2-13x-20=0$

$6a-8a-ab+3c+7a+ab3c$

$\lim_{x\to\infty}\left(\frac{-e^x+5}{x^2-2}\right)$