I am new to blogging world. Sometimes i need to put math equations in my blog. So, Is there any software for that and also where can I download it. Also, If there will be any other advice related to it please mention.
MS Word has an editor of sorts. After creating the equation, use a screen capture to grab something for the web.
Math Magic (Free) http://www.mathmagic.com/product/litewin.html
MathCast (Free) https://sourceforge.net/projects/mathcast/
MathType ($$ Design Science) http://www.dessci.com/en/products/mathtype/
Also you can try AsciiMath.