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If (1+x)^(15)+C(0)+C(1)x+C(2)x^(2)+C(3)x...

If `(1+x)^(15)+C_(0)+C_(1)x+C_(2)x^(2)+C_(3)x^(3)+ . . .+C_(15)x^(15) and (k=C_(2)+2C_(3)+3C_(4)+ . . .+14C_(15))` then the value of `(k-993)/(1000)` is equal to______

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