QUES: Most insects sting or bite which can be unpleasant slightly irritating and itching however the stings are pretty harmless

correct the punctuation.

CORRECTED: Most insects sting or bite which can be unpleasant, slightly irritating, and itching; however, the stings are pretty harmless.

QUES: These user pages have been visited 9291 times since 4112011

correct the punctuation.

CORRECTED: These user pages have been visited 9291 times since 4/11/2011.

QUES: flowering plants several yellow flowers and plants

correct the punctuation.

CORRECTED:
flowering plants | several yellow flowers and plants