(y-9)^2
(2x-y)(2x+y)
(4-x)(16+4x+x^2)
-x(2x+5)
(a-3b)(3b+a)
(2m+1)
(8x-7)^2
(7a-2)(a-3)
(4a+5b)(16a^2-20ab+25b^2)
-5p^2(2p^4-3)
(1+a)(a-1) Срочно решение!!!

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