$( 6 x - 3 y ) ( 2 x - 7 y )$
$\left(x^3-x^2+x-1\right)\left(x^3+x^2-x+1\right)$
$\int e^{x-8}dx$
$=\tan^{2}\alpha\left(\ran^{2}\alpha-1\right)$
$m^4-10m^2+15$
$3\sqrt{48}+5\sqrt{3}-2\sqrt{192}$
$10\cdot10\cdot10$
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