$\left(\sec^2x-1\right)\cos^2x=\sin\left(^2x\right)$
$36-y^4$
$x^2+7x=-6$
$\:\left(p+4q\right)^3$
$\left(\frac{2}{3}x\:+4\right)^2$
$\lim_{x\to0}\left(\frac{2x^2+7x}{e^x}\right)$
$29+42+57+10$
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