Răspuns :
(3 * 2²⁰ + 7 * 2¹⁹ * 5²)/(13 * 8⁴)² =
2¹⁹(3 * 2¹ + 7 * 1 * 5²)/[13 * (2³)⁴]² =
2¹⁹(6 + 175)/(13 * 2¹²)² =
2¹⁹ * 181/13² * 2²⁴ =
1 * 181/169 * 2⁵ =
181/5408
2¹⁹(3 * 2¹ + 7 * 1 * 5²)/[13 * (2³)⁴]² =
2¹⁹(6 + 175)/(13 * 2¹²)² =
2¹⁹ * 181/13² * 2²⁴ =
1 * 181/169 * 2⁵ =
181/5408