2. Exponential power is exponential, which means that the exponent of this unknown is multiplied by several times; In the operation, we must first calculate the index after exponential multiplication, and then multiply the unknown number according to the obtained index.
3. Power means that this unknown number is multiplied by several times. For example, n m means that the formula represents m n times. The result of taking n m as a power is called the m power of n.