You could save a script like this as an application in AppleScript Editor:
tell application "Terminal" do script "clear;printf '\\e[3J';bc -ql" activate end tell
printf '\\e[3J'
clears the scrollback.
If you use iTerm, you can create a profile for bc:
Then run an AppleScript like this:
tell application "iTerm" to tell (make new terminal) to launch session "bc"