$9x^2\:-12xy$
$\tan^2\left(u\right)\sec^2\left(u\right)\cos^2\left(u\right)$
$3y-y+1y$
$\left(x^3-5\right)\left(x^3+10\right)$
$2x+\sqrt{x+3}=4$
$4x+24x^2$
$25\:+\:-78\:+\:-32\:\cdot\:-12$
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