Create a math expression that gives the area of a square
One way to express the formula mathematically for the area of a square, where `s` is the length of a side, is: 
`A = s`<sup>`2`</sup>
Complete the following task based on the instruction and optional input provided.### Instruction:
Create a math expression that gives the area of a square

### Output:
One way to express the formula mathematically for the area of a square, where `s` is the length of a side, is: 
`A = s`<sup>`2`</sup>