$\ln\left(x^2-1\right)-\ln\left(x-1\right)=\ln\left(4\right)$
$-16+5n=-7\left(-6+8n\right)+3$
$\left(wu^2-3\right)^2$
$-6+6-45-216$
$\int-\frac{2\left(2x^2+19x+47\right)}{\left(x+4\right)^3}dx$
$\frac{2-2x}{x-3}\ge2$
$3x+y=-2$
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