$\left(1-5q\right)-\left(2.5s+8\right)$
$x^2+81x+80=0$
$2xz+3x-12z-15z+7xz-13x$
$1^2-5-1$
$\left(18+2y\right)^2$
$x^2-6x=6$
$\left(\pi-4.7416+\sqrt{5^2}\right)$
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