(1)(x+3)2_(x+2)(x_1) (2)(a+b+3)(a_b_3) ((1)(x+3)2_(x+2)(x_1) (2)(a+b+3)(a_b_3) (用完整的过程回答)

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(1)(x+3)2_(x+2)(x_1) (2)(a+b+3)(a_b_3) ((1)(x+3)2_(x+2)(x_1) (2)(a+b+3)(a_b_3) (用完整的过程回答)
(1)(x+3)2_(x+2)(x_1) (2)(a+b+3)(a_b_3) (
(1)(x+3)2_(x+2)(x_1) (2)(a+b+3)(a_b_3) (用完整的过程回答)

(1)(x+3)2_(x+2)(x_1) (2)(a+b+3)(a_b_3) ((1)(x+3)2_(x+2)(x_1) (2)(a+b+3)(a_b_3) (用完整的过程回答)