To see previous Precalculus exams on library reserve from off campus you may need to log in. Usually, use your Montana State University "netID" (your Banner/One Card ID as your username with your netID password).  More information
on accessing the proxy server can be found at
https://auth.lib.montana.edu/cas/login?service=https://auth.lib.montana.edu/cgi-bin/ars.pl

but you might as well just the exams here:
previous Precalculus exams