$3\log y-2\log x-4\log z$
$\int\frac{5x^2+10x}{\left(x+1\right)^2}dx$
$4\left(x\:+\:8\right)\:+\:5\left(x\:-\:3\right)$
$\:-\frac{3}{4}a^2b-\frac{1}{8}a^2b$
$\left(n^2+4\right)\left(n^2-7\right)$
$\int-2\cot\left(x\right)dx$
$20a^2+23a-21$
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