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: Government promises are empty

correct the punctuation.

CORRECTED: Government promises are empty.

QUES: Contemporary Chinese Artist Chen Baoyi Oil Painting Art Appreciation Chrysanthymum Stupendous Art World with Excellent Chinese Oil Painting Artists Stupendous Art World with Excellent Chinese Oil Painting Artists

correct the punctuation.

CORRECTED:
Contemporary Chinese Artist Chen Baoyi Oil Painting Art Appreciation: Chrysanthymum - Stupendous Art World with Excellent Chinese Oil Painting Artists | Stupendous Art World with Excellent Chinese Oil Painting Artists