2x+49x2−25\frac{2x+4}{9x^2-25}9x2−252x+4
(969)2\left(\frac{9^6}{9}\right)^2(996)2
tan2x=2cotxcot2x−1tan2x=\frac{2cotx}{cot^2x-1}tan2x=cot2x−12cotx
limx→0(4s(s2+2s+3))\lim_{x\to0}\left(\frac{4}{s\left(s^2+2s+3\right)}\right)x→0lim(s(s2+2s+3)4)
30:(4−14)+(−8:2−3).230:\left(4-14\right)+\left(-8:2-3\right).230:(4−14)+(−8:2−3).2
x2−8x=−7x^2-8x=-7x2−8x=−7
2x6+3x22x^6+3x^22x6+3x2
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