$\cos\left(a\right)=\left(\sin\left(a\right)+\frac{1}{\cos\left(a\right)}\right)\left(1-\sin\left(a\right)\right)$
$\int\frac{10}{\sqrt{16x^2+36}}dx$
$\int\frac{3x^3-3x+4}{4x^2+3x}dx$
$-x^3-2x^2+5x+6$
$\frac{d}{dx}\:t^3\:lnt$
$10x^2y^2+11y^3$
$4x^2-16x+20\ge0$
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