$100j^2+40j+4\:\cdot6$
$7s-2s-s$
$\cos\left(-0.625\right)$
$10x^2-60x+9$
$512x^3-7^3$
$\left(5y+1\right)\left(5y-1\right)$
$125m^9-64n^{12}$
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