$\int\left(10e^{2x}\sqrt{4+e^{2x}}\right)dx$
$3sinx\:=\:3-3cosx$
$-x+1\le-3$
$y^4-49$
$\left(-3^3\right)\:+\:5^2\:-\left(8\right)$
$-869-726$
$\lim_{x\to\:-3}\frac{x^3+x^2-6x}{x^2+3x}$
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