I am not familiar with html.I want to show formulas in my blogs.But there is blank between my two lines if I put a picture in one line.Please look at my page [my\_web\_page](http://neilhappy.blogspot.com/2013/01/linear-sieve-method-for-prime-numbers.html).There is so big blank between the 3 lines than others.I try to change the height of the picture but it was useless.Please tell me where I was wrong or tell me how to show formulas easily in my web pages.Thanks very much!