Express the following fractions in ascending order:
45, 55, 67: ___, ___, ___
45
67, 55
45=4×75×7=2835;
55=5×75×7=3535;
67=6×57×5=3035
2835, 3035, 3535
The sum of the series 23!+45!+67!+... to ∞ = ae. Find (a+3)2.
Express the following fractions in descending order:
77, 314, 57: ___, ___, ___