1, the index is located at the upper right of an unknown number, indicating that the unknown number is multiplied by several times; The exponent of the first term is only the power of this unknown. The exponent of the quadratic term (or more terms with multiple unknowns) is the sum of the times of all unknowns.

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.