QUES: Hamsun himself complained that the Americans often stole his works and published without his consent and without paying roylties

correct the punctuation.

CORRECTED: Hamsun himself complained that the Americans often stole his works and published without his consent and without paying roylties.

QUES: The third reason is that the use of a substance or substance group has been regulated in law thereby reducing the risk in the use phase

correct the punctuation.

CORRECTED: The third reason is that the use of a substance or substance group has been regulated in law, thereby reducing the risk in the use phase.

QUES: This is the next milestone in the releasecycle of potato which will become Debian GNULinux 22 when it is released

correct the punctuation.

CORRECTED:
This is the next milestone in the release-cycle of "potato", which will become Debian GNU/Linux 2.2 when it is released.