express框架:(x 1)(x 2)(2x 3)(x 6)-20x4

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(x 1)(x 2)(2x 3)(x 6)-20*4
= 1*2*2*3*6-20*4
= 72-80
= -8

1*2*6*6-20*4=72-80=-8

x 1)(x 2)(2x 3)(x 6)-20*4
= 1*2*2*3*6-20*4
= 72-80
= -8
你无聊啊

(x 1)(x 2)(2x 3)(x 6)-20*4
= 1*2*2*3*6-20*4
= 72-80
= -8

-8

-8