Răspuns:
(3¹⁹×25⁹)² :15³⁶=
(3¹⁹·25⁹)²=3³⁸·25¹⁸=3³⁸·(5²)¹⁸=3³⁸·5³⁶
15³⁶=(3·5)³⁶=3³⁶·5³⁶
3³⁸·5³⁶: 3³⁶·5³⁶ = 3³⁸⁻³⁶·5³⁶⁻³⁶= 3²·5⁰=9·1=9