$\lim_{x\to-90}\left(\frac{\ln\left(90-x\right)}{\tan\left(x\right)}\right)$
$-598-483$
$x^2-x+2>0$
$\int\frac{x+5}{x^2-6x+11}dx$
$\frac{\left(6-2i\right)}{\left(-4+3i\right)}$
$54x-12$
$x^2-13x+21$
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