$7\cdot23-7\cdot19$
$\left(2a-8b\right)^3$
$\log\left(\log\left(1\right)\right)$
$3\left(1-cos^2x\right)=3\tan^2\left(x\right)$
$\left(-5x^2-4x-6\right)^2$
$\left(p^3-\frac{5}{2}\right)^2$
$xy'+2y=x^2+x$
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