$\left(x^{\frac{1}{3}}-\frac{1}{4}x^{-\frac{1}{3}}\right)^2$

$\left(5x-3y\right)\left(5x+7y\right)$

$\lim\:_{x\to\:0}\left(\frac{\ln\:\left(\frac{2x+1}{5x+1}\right)}{x}\right)$

$5\left(x-3\right)+7\left(x+4\right)=73$

$38x^2+25x-250$

$\frac{dy}{dt}+\frac{1}{8}sec\left(\frac{t}{8}\right)y=9cos\left(\frac{t}{8}\right)$

$\left(7x+2\right)\left(2x^2-x-4\right)$