$4\left(2m+6\right)+3\left(3+5m\right)$
$\log_a\left(x^2+1\right)+2\log_a\left(4\right)=\log_a\left(40x\right)$
$\left(2x+11x+23x+20\right)$
$\left(a+b-c\right)\left(a-b-3c\right)$
$1^2+4x-5$
$-\frac{cos2x\:}{sinx\:}=2sinx\:-cscx\:$
$\lim_{x\to0}\left(-\frac{2}{3}x\cdot\ln\left(x\right)\right)$
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