$\left(12+9mc\right)\left(12-9mc\right)$
$\lim_{x\to2}\frac{x^3-8}{x-b}$
$686x^7-1024x^4$
$\int_0^x\left(\frac{a}{\left(1+x\right)^{\left(a+1\right)}}\right)dx$
$2\sin\left(x\right)-1=5$
$\int\left(\frac{x^2}{x^4-10x^2+9}\right)dx$
$\frac{\pi}{4}+\frac{\pi}{6}$
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