$6xe^x+x^2e^x$
$\left(xyz-2a\right)\left(xyz+2a\right)$
$3\cos x+2-2\cos^2x=0$
$-7m^3n^2+14m^3n^2$
$6xz-16y-24+4xy$
$\left(x+\frac{1}{3}\right)\left(3x^4+\frac{3}{5}\right)$
$\sec^2\left(\frac{\pi}{2.6}\right)+3\cot\left(\frac{\pi}{1.2}\right)$
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