$\int\frac{x+1}{\left(x^2+x+1\right)\left(x-1\right)\left(x+2\right)^2}dx$
$35m-16m+78m-39m+27m$
$\left(n+7\right)\left(n-7\right)$
$222-3\cdot4-4\cdot5+18:6$
$24x^2\:-\:9x$
$sin\left(30\right)=\frac{y}{1}$
$85\cdot\left(-34\right)$
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