intsqrt(1+2tanx(secx+tanx))dx=...

`intsqrt(1+2tanx(secx+tanx))dx=`

`log_(e)|sec^(2)x+tanxsecx|+c`

`log_(e)|1+tanx(secx-tanx|+c`

`log_(e)|sinx(secx-tanx)|+c`

none of these

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