$\left(\frac{1}{2}a+\frac{1}{3}b\right)^2$
$\int\frac{x^2+2x}{x^2+1}dx$
$\left(2m-16\:\right).\left(5m+10\right)$
$\int\frac{2t+1}{t^2+t-6}dx$
$a^4b^7c+a^8b^2f$
$7x^4-5x^4$
$7m-5\cdot7m+5$
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