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化简下列各式:
(1)$2a+2(a+1)-3(a-1)$; (2)$5(3a^{2}b-ab^{2})-4(-ab^{2}+3a^{2}b)$;
(3)$(3x+1)-2(2x^{2}-5x+1)-3x^{2}$; (4)$a+[2a-2-(4-2a)]$;
(5)$3x^{2}-[7x-(4x-3)-2x^{2}]$; (6)$-(3a^{2}-4ab)+[a^{2}-2(2a+2ab)]$;
(7)$2a^{2}b+2ab^{2}-[2(a^{2}b-1)+2ab^{2}+2]$; (8)$1-3(2ab+a)+[1-2(2a-3ab)]$.
(1)$2a+2(a+1)-3(a-1)$; (2)$5(3a^{2}b-ab^{2})-4(-ab^{2}+3a^{2}b)$;
(3)$(3x+1)-2(2x^{2}-5x+1)-3x^{2}$; (4)$a+[2a-2-(4-2a)]$;
(5)$3x^{2}-[7x-(4x-3)-2x^{2}]$; (6)$-(3a^{2}-4ab)+[a^{2}-2(2a+2ab)]$;
(7)$2a^{2}b+2ab^{2}-[2(a^{2}b-1)+2ab^{2}+2]$; (8)$1-3(2ab+a)+[1-2(2a-3ab)]$.
答案：
(1)$a+5$
(2)$3a^{2}b-ab^{2}$
(3)$-7x^{2}+13x-1$
(4)$5a-6$
(5)$5x^{2}-3x-3$
(6)$-2a^{2}-4a$
(7)0
(8)$2-7a$
(1)$a+5$
(2)$3a^{2}b-ab^{2}$
(3)$-7x^{2}+13x-1$
(4)$5a-6$
(5)$5x^{2}-3x-3$
(6)$-2a^{2}-4a$
(7)0
(8)$2-7a$
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