4xy+7xy+6x2y+3xy24xy+7xy+6x^2y+3xy^24xy+7xy+6x2y+3xy2
(2x)x5x2\left(2x\right)\frac{x^5}{x^2}(2x)x2x5
(3v2−2v−5)(7v−4)\left(3v^2-2v-5\right)\left(7v-4\right)(3v2−2v−5)(7v−4)
2cosu(1−cos2u)=sinu2\cos u\left(1-\cos^2u\right)=\sin u2cosu(1−cos2u)=sinu
a+2b+3c=0a+2b+3c=0a+2b+3c=0
3⋅limx→2(5−xx−2)3\cdot\lim_{x\to2}\left(\frac{5-x}{x-2}\right)3⋅x→2lim(x−25−x)
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