$\int\frac{1}{x\left(x^4-1\right)}dx$
$\frac{d}{dx}\left(\sqrt{4x+3}\right)\left(2x^3+3\right)$
$x-5y+7x+6y-4x-8y+4x-6y$
$\left(4x^6\:-2y^5\right)^5$
$\lim_{x\to\infty}\left(\frac{150\cdot x}{x+5}\right)$
$2-\left(-4\right)+4+2$
$43\cdot20$
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