Ido not get how to make one ( extra points )

So basically, you create a sum including a decimal number, a number that is to the power of something (that's the exponent), a whole number, and all of the mathematical operations. (+, -, ÷, ×). An example would be like (10 + 6.8) - 42 = (2^2 × 7)/4 and then you'd figure it out