$f\left(x\right)=ad\left(4^2+2x-3\right)$

$\frac{1}{x-1}<\frac{1}{x+1}$

$1-\sqrt{\frac{x-5}{x+5}}$

$\left(3f+5\right)\left(4+3f\right)$

$\lim_{x\to\infty}\:\left(2-x\right)\left(3+7x\right)$

$-\frac{49}{20}\int\frac{\cos\left(x\right)}{x}dx$

$\int\frac{\log\left(x\right)^2+3}{x\log\left(x\right)}dx$