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(1)25a-5a^2 (2)(x-y)^2+4xy(3)x^3-3x^2y+2xy^2(4)1/2x^2-2x+2 (5)x^2-2x-3(6)a^4-2a^2b^2+b^4
(7)(x+y)(x-y-14)+49 (8) (a+2b)²-2(a+2b)+1 (9) 2a^2+2b^2+3c^2+5ab-5bc-7ac
(10)x^3-6x^2+3x+10 (11) (2x+1)(x-y)-(3x+1)(x-y) (12)x³-3x+2
(13)x的4次方+81/4 (14)x的4次方+x²y²+y的4次方 (15)x²y-7xy+6y
(16)x的4次方-8x²+16 (17)(ap-bp)² +4abp²禅纤
(18)y³-3y²+y (19)a五次-16a³-36a (20)4(x+y)²-25
(21)4a²-(手袭梁a²+1)² (22)x²+xy-3x-3y (23) x³+9x²+26x+24
(24) a³b-ab³+a²+b²毕运+1 (25) 12a²b(x-y)³-4ab(y-x)² (26) (a²-4a)²+(3a-12)²
(7)(x+y)(x-y-14)+49 (8) (a+2b)²-2(a+2b)+1 (9) 2a^2+2b^2+3c^2+5ab-5bc-7ac
(10)x^3-6x^2+3x+10 (11) (2x+1)(x-y)-(3x+1)(x-y) (12)x³-3x+2
(13)x的4次方+81/4 (14)x的4次方+x²y²+y的4次方 (15)x²y-7xy+6y
(16)x的4次方-8x²+16 (17)(ap-bp)² +4abp²禅纤
(18)y³-3y²+y (19)a五次-16a³-36a (20)4(x+y)²-25
(21)4a²-(手袭梁a²+1)² (22)x²+xy-3x-3y (23) x³+9x²+26x+24
(24) a³b-ab³+a²+b²毕运+1 (25) 12a²b(x-y)³-4ab(y-x)² (26) (a²-4a)²+(3a-12)²
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