QUES: Historically VDI and desktop virtualisation has been considered a complicated space and only the biggest companies who are most focused on security have deployed it to date McNaught said

correct the punctuation.

CORRECTED: "Historically, VDI and desktop virtualisation has been considered a complicated space, and only the biggest companies who are most focused on security have deployed it to date," McNaught said.

QUES: As a matter of fact I had no access to mathematical literature except in the highest grades

correct the punctuation.

CORRECTED: As a matter of fact I had no access to mathematical literature except in the highest grades.

QUES: They are far more flexible to position than their predecessors

correct the punctuation.

CORRECTED:
They are far more flexible to position than their predecessors.