$e^{\sqrt{x}}\cdot\left(x^2-3x\right)$
$\csc^2x-1\sec^2x=\csc^2x$
$\left(4m+3n\right)\cdot\left(4m-3n\right)$
$108\:=\:6k$
$4x^2-3x+1=0$
$\sec\left(x\right)-2=0$
$3a-2b+4c-4a-5b-c$
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