$3\:<8+x$
$\int\frac{1}{\left(x+2\right)\left(x+7\right)}dx$
$\int_{+\infty\:}^{12}\frac{1}{37}\:dx$
$-x^2+225x-12500$
$\sec\left(x\right)\cdot\cos\left(x\right)=\cot\left(x\right)$
$\frac{d}{dx}\tan^34x=\left(\tan\left(4x\right)\right)^3$
$6x^2-3;\:x=2$
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