$x-31=100$

$\frac{x^3x^2-37x-35}{x-7}$

$\left(3a+9\right)\left(3a-9\right)$

$\int e^{4x-9}dx$

$\int\left(2-3y\right)^2ydy$

$\frac{d}{dx}\left(e^{4x}-x^2=8-ln\left(xy^3\right)\right)$

$-\frac{\left(1\right)}{\left(2\sqrt{\left(1-x\right)\cdot\left(\sqrt{x}\right)}\right)}-\frac{\left(\sqrt{\left(\left(1-x\right)\right)}\right)}{2x^{\left(\frac{3}{2}\right)}}$