$16n\cdot2-n$
$5x^4-3x^2+2x^2+6x$
$9x^2=16$
$\frac{d}{dx}y=7^{\frac{7}{x}}$
$6m^7n^7-12m^3n^6$
$-\left[-13+\left(24-68\right)\right]-\left(-48+95\right)$
$\left(x^2yz+7\right)^2$
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