$-9\cdot\left(5a+m\right)$
$a^2+14ab+49b^2$
$-8x-11$
$7-3\cdot1$
$144 \times 4 ^ { 4 } - 819 ^ { 4 } b ^ { 2 }$
$\frac{1-n^3}{1-n}$
$\int\:\frac{r^2}{r-4}dr$
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