$\frac{d}{dx}\left(cos^4\left(x\right)\right)$
$\lim_{t\to4}\left(\frac{t^3-2t-56}{t^2-t-20}\right)$
$143\cdot\left(-23\right)$
$\frac{dy}{dx}\left(5x^4-3x^2-2\right)$
$\int\frac{x}{x^2+10}dx$
$\left(4m+3n\right)^x\left(4m-3n\right)$
$\int\left(28+x^2\right)dx$
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