$\frac{dy}{dx}\left(x^2+y^2=20\right)$
$\lim_{x\to\frac{1}{2}}\left(\frac{8x^3-1}{2x-1}\right)$
$\frac{dy}{dt}=\frac{1}{t^2y+y}$
$49x^6-36$
$\int\frac{1}{v\left(1+v^2\right)}dv$
$\int\sqrt{x^2}+72xdx$
$x+3\sqrt{x^2}+2x-3$
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