Because not everybody may have the special maths fonts, etc. It is better to draw your formulas as images.
If you draw the formula in whatever word processing program you can, which has an insert formula option. The press ALT + PrintScrn. This puts a "capture" of the current Window on the clipboard.
Open your graphics program, and Paste. You can then crop it or whatever so it's exactly how you want it.
With any business, it is up to the individual owner of said business to ensure the success of the business. You may make more or less than any sample figures or results that might be quoted on our web sites or other publications. All business involves risk, and many businesses do not succeed. Further, Answers 2000 Limited does NOT represent that any particular individual or business is typical, or that any results or experiences achieved by any particular individual/business is necessarily typical.