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化简下列各式:
(1)$(-5ab+6a)-3(2a-b)+2ab$; (2)$-3(2x^{2}-xy)+4(x^{2}+xy-6)$;
(3)$a+[2a-2-(4-2a)]$; (4)$3x^{2}-[7x-(4x-3)-2x^{2}]$;
(5)$-(3a^{2}-4ab)+[a^{2}-2(2a+2ab)]$; (6)$1-3(2ab+a)+[1-2(2a-3ab)]$;
(7)$2(2b-3a)+3(2a-3b)$; (8)$4a^{2}+2(3ab-2a^{2})-(7ab-1)$;
(9)$-3(2x-3)+7x+8$; (10)$3(x^{2}-\frac {1}{2}y^{2})-\frac {1}{2}(4x^{2}-3y^{2})$.
(1)$(-5ab+6a)-3(2a-b)+2ab$; (2)$-3(2x^{2}-xy)+4(x^{2}+xy-6)$;
(3)$a+[2a-2-(4-2a)]$; (4)$3x^{2}-[7x-(4x-3)-2x^{2}]$;
(5)$-(3a^{2}-4ab)+[a^{2}-2(2a+2ab)]$; (6)$1-3(2ab+a)+[1-2(2a-3ab)]$;
(7)$2(2b-3a)+3(2a-3b)$; (8)$4a^{2}+2(3ab-2a^{2})-(7ab-1)$;
(9)$-3(2x-3)+7x+8$; (10)$3(x^{2}-\frac {1}{2}y^{2})-\frac {1}{2}(4x^{2}-3y^{2})$.
答案：
(1)$-3ab+3b$
(2)$-2x^{2}+7xy-24$
(3)$5a-6$
(4)$5x^{2}-3x-3$
(5)$-2a^{2}-4a$
(6)$2-7a$
(7)$-5b$
(8)$-ab+1$
(9)$x+17$
(10)$x^{2}$
(1)$-3ab+3b$
(2)$-2x^{2}+7xy-24$
(3)$5a-6$
(4)$5x^{2}-3x-3$
(5)$-2a^{2}-4a$
(6)$2-7a$
(7)$-5b$
(8)$-ab+1$
(9)$x+17$
(10)$x^{2}$
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