Let intx^6sin(5x^7)dx=k/5cos(5x^7)+C1, x...

Let `intx^6sin(5x^7)dx=k/5cos(5x^7)+C_1, x!=0, and int (dx)/(7x+14)=mlog|7x+14|C_2.` then `k+m` equals

A

`0`

B

`(1)/(2)`

C

`-(1)/(2)`

D

`3`

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