$16x^2+36$
$5^2\cdot\left(2\cdot8-10\right)$
$\frac{x^2}{100}-\frac{y^2z^4}{81}$
$1-8t^5+16t^{10}$
$\frac{1}{1+\cos x}-\frac{1}{1-\cos\left(-x\right)}=-2\cot\left(x\right)\csc x$
$17^5$
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