$48mx-24nx$
$\left(a\:+\:6\right)^2$
$\left(3x^2+5y^4\right)-\left(3x^2-5y^4\right)^2$
$3x\:+\:1\:\ge\:2x\:-\:3$
$sen\theta\:\:sec\theta\:\:cot\theta\:-\:cos^2\theta\:$
$4\cdot3\cdot2\cdot1^4$
$12a+10b$
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