I would like to share a super easy way to use math representations in Tistory blog. I used to blog in blogspot, and back then I had to add some javascript to under the tag, paste the script above, just like the picture bellow. Now Let's see the Examples $$ \begin{aligned} (x+y)^2 \= x^2 + 2xy + y^2 \\ \= (x+y)(x+y) \end{aligned} $$ \begin{aligned} (x+y)^2 &= x^2 + 2xy +..