$4\left(1+a\right)^2-4\left(1+a\right)\left(b-1\right)-\left(b-1\right)^2$
$6.2+8.9w-12-11.2-6.2$
$\frac{4x^3-9x^2+14x-5}{x^2-2x+1}$
$534.77+651.88$
$a^3b^3-8c^3$
$x^2=8y$
$\left(3x+5y\right)\left(2x-3y\:\right)$
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