$5\sqrt{x}+3\sqrt[3]{x^2}+2\sqrt[2]{x^3}$
$\left(\sqrt{2}-5\right)\left(\sqrt{2}+5\right)$
$1+2\cdot5$
$\left(2a+3b\right).\left(4a-2b\right)$
$\left(9a-2\right)\left(9a+2\right)$
$2\:x\:\frac{3}{-4}\:x\:\frac{8}{3}\:x\:\frac{5}{4}$
$4+4z-8z-3z+-2z-6$
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