$\sqrt{0}-15$
$\frac{x^3-7x-6}{x-3}$
$\int\frac{5x^2-4}{\left(x^2-4\right)\left(x^2+4\right)x}dx$
$\left(1-a\right)^4$
$2x^2-80x+3075=0$
$\left(-2n+3i\right)^2$
$\lim_{x\to7}-x^2+50$
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