Merge 2 channels function

package main

func main() {}

func Merge2Channels(f func(int) int, in1 <-chan int, in2 <-chan int, out chan<- int, n int) {
  go func() {
    ww1 := make(chan chan int, n)
    ww2 := make(chan chan int, n)

    go func() {
      for i := 0; i < n; i++ {
        f1 := <-<-ww1
        f2 := <-<-ww2
        out <- f1 + f2
      }
    }()

    input := func(in <-chan int, ww chan chan int) {
      for i := 0; i < n; i++ {
        w := make(chan int)
        ww <- w
        x := <-in
        go func(w chan int, x int) { w <- f(x) }(w, x)
      }
    }

    go input(in1, ww1)
    go input(in2, ww2)
  }()
}