$5x\:-\:9\:en\:x\:=-2$
$\int ct\:dt$
$1-9x-2$
$0.3\left[x-2.1\right]>0.6\left[2x-1.2\right]$
$m^2+1=0$
$\left(y-4\right)\left(y-4\right)^2$
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