(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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