Please can you help me it is very interested to me

[optic27h]

how can i write equations of physics ?
i try write the code of latex from a web and copy the code from the web and paste it in picture icon but the equation cannot see.
please help me
i note some user can write physics equations in the forum

 

[yenchin]

https://www.physicsforums.com/showthread.php?t=386951

 

[JaredJames]

Don't use picture tags, use the latex ones.

Although I believe we're on Mathjax now so you don't need tags?

 

[Fredrik]

You still need tex or itex tags. (It seems that you don't need tex tags if your latex starts with a begin statement, but I would recommend that you type the tags anyway, just to decrease the probability that your old posts will be broken by a future upgrade).

Optic27h, the best way to learn is to just click the quote button when you see a post that makes you think "I wonder how he did that". Try it on this one. If I want the equality $E=mc^2$ to appear in the middle of a sentence, I use itex tags. If I want it to appear on a line by itself, I use tex tags instead. For example, I could say that the formula $$E=mc^2$$ was found by Einstein.

Always preview before you post, so that you know that your LaTeX code works.