$5y<2$
$8x^2-121>7x^2-120$
$\frac{dy}{dx}-6x=0$
$\lim_{x\to-4}\frac{x^2-16}{x^2-4x}$
$cos\:x\:\left(sec\:x\:+3\:tan\:x\right)$
$3y+2x+4^2$
$2x+6<-2$
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