How do you insert parentheses, operation signs, and exponents to make 3 -2 7 = 4 true?

Jun 3, 2017

${3}^{2} - - 2 - 7 = 4$

Or if you were allowed to rearrange the equation and use factorials,

7-(3!)/2=4

Explanation:

${3}^{2} - - 2 - 7 = 4$

$9 + 2 - 7 = 4$

$11 - 7 = 4$

3! =3*2*1=6
$\frac{6}{2} = 3$
$7 - 3 = 4$