LaTex equations on the blogspot

Need in this feature so much and found not so simple, but working solution

At first render equation in online Latex editor. After that, convert code in an url editor. And finish step include it in the google charts.

sample url
http://chart.apis.google.com/chart?cht=tx&chl=s(t-%5Ctau)%3DC(t-%5Ctau)%5Cexp%5E%7Bj%5Comega%7B(t-%5Ctau)%7D%7D

and the picture