$\tan^2\left(x\right)\left(\cos^2\left(x\right)+1\right)+\cos^2\left(x\right)=\sec^2\left(x\right)$
$6x^2-116x+412=3x^2-68x-220$
$3x^2-3x+4$
$\int\frac{2x^3}{\sqrt{1+3x^4}}dx$
$4x^6\:-\:x^3\:+\:\frac{25}{100}$
$2^{18}$
$\frac{x+5}{2}\le\frac{12+3x}{4}$
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