$3x\:<5x\:+\:4$
$18x^2+6y^2=20$
$12a^2-8a-3a+2$
$\frac{m^{-4}}{4m^4\:}\:$
$8\cos^2x+14\cos\left(x\right)-9=0$
$45-\left(72-22\right)+5-13$
$\left(-14\right)\left(-11\right)$
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