Olympia LCD-9210 - Roots, Powers, Factorials, and Combinations

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Square roots, cube roots, roots, squares, cubes, reciprocals,
factorials, random numbers,  and permutations/combinations
Example 1: 2 + 3 x 5
2 3 5
Example 2:
3
5
3
-27
+
5 27
Example 3:
7
123 ( = 123 )
7
1
7 123
Example 4: 123 + 30
2
123 30
Example 5: 12
3
12
Example 6:
-
1
3
1
4
1
3 4
Example 7: 8!
8
Example 8: Generate a random number between
0.000 and 0.999. (Results are always different).
Example 9: 3 
3
Example 10: Determine how many different four-digit numbers can be
generated with digits 1 to 7. The digits may not appear
more than once in the four-digit number (1234 is permitted
but 1123 is not).
7
4
5.287196909
-1.290024053
1.988647795
1023.
1728.
12.
40320.
0.664
9.424777961
840.