$-1<2x-3$
$a^4+a^2b^2+\frac{b^4}{4}$
$5 x + 4 > 79$
$25b^2-54b^2$
$\frac{cos\:a.\:sec\:a}{tan\:a}=cot\:a$
$30x^4+36x^2+6$
$\frac{d}{dx}\left(x^x\right)\left(x+8\right)^4\left(5x-9\right)^3$
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