QUES: Before you can open a LEGIT file youll need to figure out what kind of file the LEGIT file extension refers to

correct the punctuation.

CORRECTED: Before you can open a LEGIT file, you'll need to figure out what kind of file the LEGIT file extension refers to.

QUES: Poincar had studied curves on a surface but Lefschetz pushed the ideas into much more general settings by building a theory of subvarieties of an algebraic variety

correct the punctuation.

CORRECTED: Poincare had studied curves on a surface but Lefschetz pushed the ideas into much more general settings by building a theory of subvarieties of an algebraic variety.

QUES: The investments in Nybro go to the sawmill the flooring works and the bioenergy plant

correct the punctuation.

CORRECTED:
The investments in Nybro go to the sawmill, the flooring works and the bioenergy plant.