Though there are similar questions on the subject. But it doesn't address the issue I am facing.
I am getting the same suggestions for leverage browser caching.
The suggestion I am receiving is for third party files like the one below, over which I don't have a control.
http://connect.facebook.net/en_US/all.js (20 minutes)
http://apis.google.com/js/plusone.js?_=1484083656965 (30 minutes)
http://platform.twitter.com/widgets.js?_=1484083656964 (30 minutes)
http://mywebsolutions.co.in/…element/captcha/image.php?foo=1254288041 (60 minutes)
Any suggestion how I can increase the expiry time for these files? Other answers doesn't address the problem