$3x+4-\left(5x+10\right)$
$2x^3+x^2-13x+6$
$\sqrt[8]{\frac{n^{18}a^7}{n^2b^{-1}}}$
$\int_{-1}^1\left(\frac{3e^x}{e^x-1}\right)dx$
$\cos\left(x+\frac{\pi}{2}\right)=\sin\left(-x\right)$
$3n+3=225$
$\lim_{x\to0}\left(\frac{x-4-\sqrt{x^2-48}}{x-8}\right)$
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