$1+b^3$
$m+6mn-4m-2mn$
$\left(-2x\right)^{-1}$
$\frac{2e^{-\frac{3\left(\infty\right)}{2}}}{3}$
$y+5y'+4y=e^-2x\:sec^2x\:\left(1+2tanx\right)$
$\frac{\sqrt{4-3}-1}{4-4}$
$\int\frac{x^2-x+1}{x^2\left(x^2-x\right)}dx$
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