canonicalization issue - repost

i have one site [login to view URL], require your support to detect the canonicalization issues. Freelancer has to rectify entire website canonicalization issues, now we found [login to view URL], [login to view URL], [login to view URL], [login to view URL] etc, previously one programmer has solve this error last year, but now we found again it was came into picture. I am looking only experts in this field. My site is a educational and information website, serving entire society without any expectations and advertisements.