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我要財富值
(3X+2Y)+(4X+3Y)其中X=5,Y+3
(5-4x)(5+4x)-2x(1-3x),其中x=-2
( a2b + ab2)- [ 2ab2 - (1- a2b) ] - 2,其中a= -2,b=0.5
(-3x2-4y)-(2x2-5y+6)+(x2-5y-1) 其中 x=-3 ,y=-1
3(ab+bc)-3(ab-ac)-4ac-3bc 其中:a=2001/2002,b=1/3,c=1
2X―[6-2(X-2)] 其中 X=-2
(5a+2a2-3-4a3)-(-a+3a3-a2),其中a=-2
(2m2n+2mn2)-[2(m2n-1)+2mn2+2],其中m=-2,n=2