$=12m^{3}-2m^{2}n$
$\frac{k^4}{k^2}$
$25y^2+70y^2+49z^2$
$5x-3x+4y$
$113\cdot17$
$\int x\sqrt[3]{7x^2+1}\:dx$
$\int\frac{x}{2\sqrt{x+2}}dx$
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