问题描述：
几道因式分解计算题（过程）
1.64/169a^4-289b^2c^62.25(x+y)^2-9(x-y)^23.-0.36a^4+14.xy^2-x5.2(x-y)^2-x(x-y)6.3(y-x)+2(x-y)7.4(2p+3q)^2-(3p-q)^28.(x^2+y^2)^2-x^2y^2
1.64/169a^4-289b^2c^62.25(x+y)^2-9(x-y)^23.-0.36a^4+14.xy^2-x5.2(x-y)^2-x(x-y)6.3(y-x)+2(x-y)7.4(2p+3q)^2-(3p-q)^28.(x^2+y^2)^2-x^2y^2
问题解答：
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