$\left(1+a^{5+k}\right)^2$
$\frac{x^2}{y^2}-64$
$18-\left(1+\left(-25\right)\right)$
$\left(6m-7n\right)^2$
$-32-6y<-8$
$\left(7^5\right)^3$
$-20\:x-10$
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