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化简下列各式:
(1)$3(a + 5b)-2(b - a)$; (2)$3a-(2b - a)+b$;
(3)$2(2a^{2}+9b)+3(-5a^{2}-4b)$; (4)$(2xy - y)-(-y + yx)$;
(5)$5(a^{2}b - 3ab^{2})-2(a^{2}b - 7ab^{2})$; (6)$(-2ab + 3a)-2(2a - b)+2ab$;
(7)$(5a^{2}+2a - 1)-4(3 - 8a + 2a^{2})$; (8)$2(a - 1)-(2a - 3)+3$;
(9)$(x^{2}-xy + y)-3(x^{2}+xy - 2y)$; (10)$2(2x - 3y)-(3x + 2y + 1)$.
(1)$3(a + 5b)-2(b - a)$; (2)$3a-(2b - a)+b$;
(3)$2(2a^{2}+9b)+3(-5a^{2}-4b)$; (4)$(2xy - y)-(-y + yx)$;
(5)$5(a^{2}b - 3ab^{2})-2(a^{2}b - 7ab^{2})$; (6)$(-2ab + 3a)-2(2a - b)+2ab$;
(7)$(5a^{2}+2a - 1)-4(3 - 8a + 2a^{2})$; (8)$2(a - 1)-(2a - 3)+3$;
(9)$(x^{2}-xy + y)-3(x^{2}+xy - 2y)$; (10)$2(2x - 3y)-(3x + 2y + 1)$.
答案：
(1)5a+13b
(2)4a-b
(3)-11a²+6b
(4)xy
(5)3a²b-ab²
(6)-a+2b
(7)-3a²+34a-13
(8)4
(9)-2x²-4xy+7y
(10)x-8y-1
(1)5a+13b
(2)4a-b
(3)-11a²+6b
(4)xy
(5)3a²b-ab²
(6)-a+2b
(7)-3a²+34a-13
(8)4
(9)-2x²-4xy+7y
(10)x-8y-1
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