$\frac{2x+3}{2-x^2};\:x=1$
$5x^2-22x=2$
$\frac{dy}{dx}=\frac{\cos^2\left(y\right)}{\sin^2\left(x\right)}$
$\frac{x^3+x^2-x-1}{x-1}$
$\frac{dx}{dt}=8-3x$
$\cos\left(2t+1\right)+cos\left(2t-1\right)$
$\left(5x^2-10y^2\right)^2$
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