$\frac{2x^2-4}{x-2}$
$2\left(56\right)-7$
$\left(-1\right)^{n+1}\left(\frac{\left(4x\right)^n}{n}\right)$
$\frac{x-2}{x-3}>2$
$\left(\left(1\cdot\left(-4\right)\cdot1\right)+\left(\left(4\right)\cdot5\cdot1\right)+0\right)-\left(0+\left(\left(4\right)\cdot\left(6\right)\cdot1\right)+\left(1\cdot5\cdot\left(-1\right)\right)\right)$
$\frac{1}{\cos^2\left(x\right)-\sin^2\left(x\right)}$
$n2+5n$
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