$2x-10\ge4x+4$
$-x^{-4}y^{-3}\left(2x^4y^{-1}-2x^{-3}y^2\right)$
$0.36\cdot1.2$
$13ab^2+5a^2b-4ab^2+a^2b$
$-6\left(-2+3\right)$
$x^3+x^2=x^2\left(x+1\right)$
$16n^{2\:}-\:9$
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