$450+450$
$\lim_{x\to-1}\left(\frac{\ln\left(2x+3\right)}{x+2}\right)$
$\int\frac{-x-x^2-1}{x\left(x+3\right)\left(x-5\right)}dx$
$\sqrt{98a^3b^5}c^7$
$g^2+2gb+b^2$
$\frac{x^2-11}{\left(x+1\right)}$
$\frac{-\cos^2\left(-x\right)}{cot^2x}$
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