$3x+x\left(y+5\right)\frac{dy}{dx}=0$

$\left(\:-37\right)\:-\:\left(\:-72\right)$

$\left(\tan\left(x\right)-\sec\left(x\right)\right)\cdot\left(\tan\left(x\right)+\sec\left(x\right)\right)$

$\log\left(x\right)+\log\left(y\right)=\frac{1}{2}\log\left(9y^2\right)$

$\frac{3}{\left(2\right)\left(1+x\right)}$

$\left(2m^2-10y\right)\left(2m^2+10\right)$

$\lim_{x\to\infty}\left(\frac{\sqrt{2+6x^2}}{10x+2}\right)$