$\left(cos\left(y\right)+2\right)\left(\frac{dy}{dx}\right)=2x$
$4x^2-20x+16$
$\frac{\sin\:\left(x\right)^2+\cos\:\left(x\right)^2}{\cos\left(x\right)}$
$\frac{1}{8}x^3-x^2$
$1+\cos\left(2x\right)=\cot\left(x\right)$
$x^2-140=4$
$\int\frac{x^{9}}{x^{5}+1}dx$
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