$2c^2\left(2c^2-4c-2\right)$
$2\left(\frac{4}{7}x\right)\left(\frac{7}{3}\right)$
$2+x+2$
$\left(2x+3y+4z+99\right)-\left(x+2y+3z\right)$
$\sqrt{2}-\sqrt{8}$
$\left(4a^2+5x^3\right)^2$
$4x-8;\:x=-3$
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