$\left(4x+3\right)\left(x-2\right)$
$\lim_{x\to2}\:\frac{x+2}{x-2}$
$7x^5-28x^3-7x^2+28$
$\frac{4}{49}\left(m^2\right)-\frac{32}{7}\left(mn\right)+64n^2$
$4b^2+3b^2-4b$
$36x^2-120x+100$
$10y+7k-2y+3k$
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