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Unfortunately there is no shortcut here. I would suggest you look at them and try to understand what these formulas are explaining – instead of necessarily “just memorizing” them.
As long as you understand these formulas and their applicability, you may simply purchase CFA formula sheets for the few days prior to your exam (wiley or schweiser) and then finally focus on remembering them.
You will also notice that many formulas repeat amongst different subjects (e.g dupont analysis).
Focus on the concepts and less on the number crunching…