Here is one way:
4 + 62 + 2/2
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1*41 2*20.5 3*13.667 4*10.25 5*8.2 ect
1, 2, 4, 41, 82, and 164
Only 2
2 and 2 2+2 = 4 2*2 = 4
Using all numbers once:4^2 x 3 - 1 = 47[42 x 3 -1 = 47]---Simpler is 41+(2x3) = 47---To use them in that order, you could use the sqrt function1 + (23)(sqrt 4) = 47