$m=\left(x+5\right)^{\left(2\right)}+\left(x-4\right)^{\left(2\right)}-2x\left(x+1\right)$
$2x^3y+3x^2w$
$6a+2b+24c$
$16ab^3-43ab^3$
$ab^2-6abc+9c^2$
$\left(2x+3y\right)-\left(3x-3z\right)$
$15\cdot7-4\cdot\left(-5\right)$
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