$\lim_{x\to2}\left(\frac{x^2+4}{x^2-3x+2}\right)$
$\frac{49x^6-98x^5+49x^4}{49x^5-49x^3}$
$\int\frac{6x+2}{x\left(x+1\right)}dx$
$\left(a+b=5\right)\left(a.b=7\right)$
$\lim_{x\to0}\left(1+\frac{5}{x}\right)^x$
$\left(4a+b\right)^3$
$71.0001+5$
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