How can you save formula in casio calculators?

I Don't think you can save formulas, however I know how to save figures (answers).

1) First have the the figure on the screen you want to save
2) Click shift
3) Click the RCL button which also has STO above it
4) Click and save the figure under a RED LETTER such as A,B,C etc
5) When saved it will be on the calculator
6) To get figures up again click the RCL button then the letter and it should bring up figure saved.