Add punctuation: With Davenport he showed that any real indefinite diagonal quadratic form in 5 or more variables takes arbitrarily small values for nonzero integral arguments
A: With Davenport he showed that any real indefinite diagonal quadratic form, in 5 or more variables, takes arbitrarily small values for nonzero integral arguments.

Add punctuation: Peugeot 504 black James
A: Peugeot 504, black, James ...

Add punctuation: History of Origami The basic form of the Triangle
A:
History of Origami - The basic form of the Triangle.