I found an old .xls file from my backup drive which dates back to year 2004, 4 years before MATHalino.com was being online and 6 years before I start to blog. The file is about the length of arc of the function y = f(x) from x = a to x = b, and the area bounded by y = f(x) and the x-axis from x = a to x = b. The method used to find the length of arc and the area was integration. You may download the file and experiment with it, mess it up, download it again, revise it, claim it as your own, do anything to it, it's up to you. The link is provided below.
 

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