1. It's a piece of cake.
2. It's a cinch.
3. It's a breeze.
4. Anyone can do it.
5. There's nothing to it.
6. It's hard.
7. It's a bit tricky.
8. It's really tough.
9. It's not a walk in the park.
10. It's very demanding. (= it takes a lot of time and energy)

Fact
More than 70% of men at age 70 are still potent.      .. More >>