$\tan\left(b\right)+\cot\left(b\right)=\csc\left(b\right)\cdot\sec b$
$\int\frac{5x+1}{\left(x+2\right)\left(x-1\right)}dx$
$3x+2\cdot3x-1$
$\frac{dy}{dx}=cx$
$\left(3t^n-1\right)^5$
$\frac{dy}{dx}=\frac{2xy}{x^2+1}+x^3$
$\int\frac{x^3}{2-x^2}dx$
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