$x^2-\left(y-x\right)^2$
$-25y^2-121$
$3x-13<5$
$-364+35-42$
$1-csc^2\left(x\right)=cot^2\left(x\right)$
$\frac{\left(2x-6\right)}{x^2-1}$
$1^{-\frac{1}{4}}$
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