$30x^2-47x+7$
$\lim_{x\to1}\left(\arctanh\left(x\right)\right)^{\ln\left(x\right)}$
$-4x+7=5x-11$
$\left(2x^3y-5z^m\right)^3$
$\left(2k-3j\right)^3$
$6x^2+30x-30x$
$\left(7x^2-5x+12\right)\left(7x^2+5x-12\right)$
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