$2x^2-2x-112$
$\sqrt[2]{1+x}\sqrt[2]{1+x}$
$\frac{x-1}{2}-2<-\frac{3x-2}{5}$
$625a^4-16b^4$
$\left(4x^{n+4m}\right)\left(-3x^{n-5m}\right)$
$\frac{sin}{1-\cos}=1+cos$
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