$\frac{d^2}{dx^2}\left(\left(2x+3\right)\left(4-x\right)\right)$

$2\sqrt{x}-7\sqrt{x}$

$\int\left(\frac{\sqrt{x}+\ln\left(x\right)}{x}\right)dx$

$x+10+100$

$\lim_{x\to07}\left(\frac{x-7}{\sqrt{x}-\sqrt{14-x}}\right)$

$\lim_{x\to0}\left(\frac{2sin\left(x\right)-sin\left(2x\right)}{1-sin\left(x\right)}\right)$

$25x^2-30xy+97^2$