1−3x4<x2−14\frac{1-3x}{4}<\frac{x}{2}-\frac{1}{4}41−3x<2x−41
5y+205y+205y+20
limx→−3(3x+4)(7x−9)\lim_{x\to-3}\left(3x+4\right)\left(7x-9\right)x→−3lim(3x+4)(7x−9)
(84)(72)\left(84\right)\left(72\right)(84)(72)
(x4+2x3−7x2−8x+12)\left(x^4+2x^3-7x^2-8x+12\right)(x4+2x3−7x2−8x+12)
5x2−12x−175x^2-12x-175x2−12x−17
−5y−4y−y-5y-4y-y−5y−4y−y
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