Can you find a way to make:
6 5 4 3 = 81
by concatenation and/or adding any of (and only) these mathematical operators:
- +
- -
- ×
- !
- ÷
- ^
- standard parentheses ()
You cannot add other numbers to the equation, or re-order the existing numbers.
The result must be a mathematical equality.
Harder version...
Try to do it while only altering the left hand side!
Inspired by Make 5 5 5 5 = 19
Hopefully somewhat more challenging than my previous attempt (may be hard not to be!)
Answer
I thought a bit too much but I finally got it:
$\frac{6+5!*4}{3!}=81$
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