$2^{-2}\cdot2^3$
$1.0\cdot8.2$
$\sqrt{\left(5x^4-x^2+10\right)}\left(10x^3-x\right)$
$\frac{25xy}{5y}$
$30\:x\:4$
$\left(4x+5\right)\left(9x-1\right)$
$\left(m^2+m+1\right)\left(m^2-m+1\right)+7m^2-385$
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