If the original is 2x + 3x2 + 6 + 5x3, you should rearrange the terms in order of exponent:
5x3 + 3x2 + 2x + 6
4x4x4
9,700
561
800
6 x 6 x 6 = 216
12,500
4x4x4
64 * * * * * 43
1,045
93 is 729
67.5
103 = 1,000
The answer in standard form is 86.3
6,479
It is six.
4,500
It is 6.6616*100