A basic formula:

Error: Failed to load processor formula
No macro or processor named 'formula' found

Making the rendered formula bigger:

Error: Failed to load processor formula
No macro or processor named 'formula' found

Indenting the formula from the left margin:

Error: Failed to load processor formula
No macro or processor named 'formula' found

Centering the rendered formula on the page:

Error: Failed to load processor formula
No macro or processor named 'formula' found