"indeed not easy" is correct and can be used in written English.
For example, you could write the sentence "This assignment is, indeed, not easy."
I talked about myself, about how my own parents were divorced, how it was indeed not easy.
This revelation has come to me a little late—I only have one more year at Cornell, which means that adapting to a new field, though somewhat related to my current knowledge base, is indeed not easy.
In fact, I took my boys to see it, and as we walked out of the theatre, my 13-year-old turned to me with a perplexed look on his face: "Mom, what the f- kind of movie was that?!" Indeed, not easy for a young teen to understand..
It is indeed not always easy to take this consummate entertainer entirely seriously, but in this case I think one should.
Indeed, it's not easy to write about.
Indeed, it was not easy to find theaters showing the film in this part of Indiana.
One of the book's strengths is that it doesn't assume transformation is easy, and indeed, it is not easy for Lou.
Singers, equally charmed and surprised, can find themselves on the wrong pitch in unexpected keys; indeed, this is not easy music to sing.
Indeed, it is not easy to teach ethical values to college students, but ethical training will be more effective if those who provide the instruction genuinely believe in what they teach.
Indeed, it's not easy to see how intervention could be distinct from divine action beyond creation and conservation.
This may sound like painful and difficult work; indeed, it is not easy.
