$\lim_{x\to\infty}\:2^{x+1}$
$-23-\left(-8\right)$
$3\left(4x+40\right)\le480$
$1a+a$
$\frac{dy}{dx}\frac{\left(y+1\right)^2}{x}=y\ln\left(x\right)$
$\frac{dy}{dx}=y+e^xsinx$
$\frac{x^5\:-\:2x^4\:+\:x^3\:+\:4\:}{x-2}$
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