Wait what? Is there any equation?
Now, we notice that the right side of the 2 at Row 10 Column 13 cannot be part of the loop, or else it would have no way to extend further without violating both 2’s to its left and right. From this, more lines are being completed:
The loop looks like a 36. I’m not sure whether the exponent 2 applies to the x or the other 2, but I’m going to take a shot and assume that we want to solve $2x^2 = 36$ here.
$x^2 = 18$
$x = 3\sqrt2$