Missing parenthesis after print statements on notebook 07 and 09

[r1vergod]

Missing parenthesis after print statements on notebook 07 and 09 classes and objects
Also, in 09 classes and objects, in the last class EvenNum(), __str__ method should be self.value but not self.val

[r1vergod]

These issues should be in notebook 10a, notebook 09 is the copied version of it, I think?