But on the rectangular raft as use the one corner as stem we could have doubt around where the vessel is pointing the centerline or the diagonal

Can you repeat this sentence, but add in punctuation?
But on the rectangular raft as use the one corner as stem we could have doubt around where the vessel is pointing - the centerline or the diagonal?
She hopes that other patients have knowledge of this additional opportunity for help

Can you repeat this sentence, but add in punctuation?
She hopes that other patients have knowledge of this additional opportunity for help.
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

Can you repeat this sentence, but add in punctuation?
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.