2¹⁹⁹⁶ + 2¹⁹⁹⁵ + 5 x 2¹⁹⁹⁴ =
= 2¹⁹⁹⁴ x ( 2² + 2 + 5 x 1 ) =
= 2¹⁹⁹⁴ x ( 4 + 2 + 5 ) =
= 2¹⁹⁹⁴ x 11
_____________________
108 + 108 x 2 + 108 x 3 + ....... + 108 x 24 = 32 400
= 108 x ( 1 + 2 + 3 + ........ + 24 ) =
= 108 x 24 x ( 1 + 24 ) : 2 =
= 108 x 12 x 25 =
= 32 400
