3a-(2b-a)+b
5m-7n-8p+5n-9m-p
5m-7n-8p+5n-9m+8p
5a-{-3b+[6c-2a-(a-c)]}
-
2(-a3+2a2)-(4a2-3a+1)
(4a2-3a+1)-3(-a3+2a2)
3(a2-4a+3)-5(5a2-a+2)
7a+(a2-2a)-5(a-2a2)
2(a-1)-(2a-3)+3
-3x2y+3xy2+2x2y-2xy2
2(2a2+9b)+3(-5a2-4b)
2(1-2x+x2)+3(-2+3x-x2)
(-3x2-xy)-3(-2x2+3xy)
4[x2-(2x2-xy+y2)]
(-ab+2a)-(3a-b)+3ab
4-3[6-2(4-2)-]+5
3x2-[7x2-2(x2-3x)-2x]
4x3-(-6x3)+(-9x3)
-2(4a-3b)+3(5b-3a)
(7y-3z)-(8y-5z)
(a+5b)-2(b-a)
x2-[7x-(4x-3)-2x2]
(2xy-y)-(-y+yx)
5(a2b-3ab2)-2(a2b-7ab)
(-2ab+3a)-2(2a-b)+2ab
(7m2n-5mn)-(4m2n-5mn)
(5a2+2a-1)-4(3-8a+2a2)
(x2-xy+y)-3(x2+xy-2y)
3x2-[7x-(4x-3)-2x2]
a2b-[2(a2b-2a2c)-(2bc+a2c)]
-2y3+(3xy2-x2y)-2(xy2-y3)
2(2x-3y)-(3x+2y+1)
-(3a2-4ab)+[a2-2(2a+2ab)]
(5x2y-7xy2)-(xy2-3x2y)
3(-3a2-2a)-[a2-2(5a-4a2+1)-3a]
3a2-9a+5-(-7a2+10a-5)
-3a2b-(2ab2-a2b)-(2a2b+4ab2)
(5a-3a2+1)-(4a3-3a2)
-2(ab-3a2)-[2b2-(5ab+a2)+2ab]
(8xy-x2+y2)+(-y2+x2-8xy)
5a+(4b-3a)-(-3a+b)
3x2-[7x-(4x-3)-2x2]
(3a2-3ab+2b2)+(a2+2ab-2b2)
2a2b+2ab2-[2(a2b-1)+2ab2+2]
(2a2-1+2a)-3(a-1+a2)
2(x2-xy)-3(2x2-3xy)
-2[x2-(2x2-xy+y2)]
(8xy-x2+y2)+(-y2+x2-8xy)
2x-(3x-2y+3)-(5y-2)
7xy+xy3+4+6x-4xy3-5xy-3
-4a2b-5ac-(3a2c-a2b)+(3ac-4a2c)
-(3a+2b)+(4a-3b+1)-(2a-b-3)
3-2xy+2yx2+6xy-4x2y
1-3(2ab+a)十[1-2(2a-3ab)]
(a2+4ab-4b2)-3(a2+b2)-7(b2-ab)
a2+2a3+(-2a3)+(-3a3)+3a2
-2(3a2-4)+(a2-3a)-(2a2-5a+5)
5-〔+(3-2a)-2(5-2a)〕
-5xy2-4[3xy2-(4xy2-2x2y)]+2x2y
(x3-2y3-3x2y)-(3x3-3y3-7x2y)
-2(ab-3a2)-[2b2-(5ab+a2)+2ab]
-3(2x2-xy)+4(x2+xy-6)
(x3+3x2y-5xy2)+(-2y3+2xy2+x2y)
3(a2-2ab)-2(-3ab+b2)
5abc-{2a2b-[3abc-(4a2b-ab2]}
5m2-[m2+(5m2-2m)-2(m2-3m)]
-[2m-3(m-n+1)-2]-1
-5an-an-(-7an)+(-3an)
x2y-3xy2+2yx2-y2x
-3x2y+2x2y+3xy2-2xy2
3a-{2c-[6a-(c-b)+c+(a+8b-6)]}
3x-[5x+(3x-2)]
(3a2b-ab2)-(ab2+3a2b)
(5a2-2a+3)-(1-2a+a2)+3(-1+3a-a2)
5(3a2b-ab2)-4(-ab2+3a2b)
4a2+2(3ab-2a2)-(7ab-1)
-3(2a+3b)-(6a-12b)
a-(a-4b-6c)+3(-2c+2b)
a2b-04ab2-a2b+ab2
3x2-[5x-2(x-)+2x2]
x-3(2x-y2)+(-x+y2)
2a3b-a3b-a2b+a2b-ab2
—2a2-[3a-(a-3)+a2]+5
2a2-[(ab-a2)+8ab]-ab
(a3-2a2+)-2(3a2-2a+)
(-x2+5+4x3)+(-x3+5x-4)
xy+(-xy)-2xy2-(-3y2x)
a2-[a2-(a2-a)-2(a2-a)]
3x2-[5x-4(x2-1)]+5x2
