$a^2+10a-25$
$125x^3+8x^3$
$x^{n+1}-x^{n+2}+x^n-x^n$
$\left(b-7\right)\left(b+5\right)$
$\frac{5x+1}{2}+\frac{x+5}{3}>5$
$x^{2\:}-\:x=-2$
$\int\frac{\sqrt{\left(x^2-a^2\right)}}{x}dx$
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