Help with long or statement

System

I'd like to conduct a test, and perform the step if one of the three dcr fields has a value checked in order to control a line break in a TPL. But am getting an error message. Whats the correct way to string multiple 'or' statements together ?

<if_if expn='({iw_value name="prodresults.Image one"/} eq "Yes"') ||
({iw_value name="prodresults.Image two"/} eq "Yes") || ({iw_value name="prodresults.Image three"/} eq "Yes") '>
.. then do this....

otherwise, skip the above...