$\lim_{x\to-1}\frac{2x}{x+2}$
$\frac{dy}{dx}\cdot\left(sin\:y\right)\cdot x^3=2$
$x^2+90x+900$
$\int\left(7x^3-4x^2-1\right)\left(x^3-4\right)dx$
$\:5+4x>8$
$\lim_{x\to\infty}\sqrt{10x^2-4x}-\sqrt{10x^2-6x}$
$\sqrt{2}\left(-x-6\right)$
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