$\tan^2\left(x\right)+2\sec^2\left(x\right)=\frac{3}{\cot^2\left(x\right)}$

$1-\frac{6}{x+7}$

$f\left(x\right)=ln\:\left[x\left(x^2+3\right)\right]$

$b^2mn,\:b=2,\:m=\frac{1}{2},\:n=\frac{1}{4}$

$-600\:-\:-50$

$14x^2y^2-27x^3+56x^4$

$\lim\:_{x\to\:0}\left(\frac{\sqrt[3]{y+x}-\sqrt[3]{y}}{x}\right)$