Version 12 (Rev 2)

The first release of version 12. This version has different expression evaluator.  The unary minus has  priority  like in VB6. 

1) Unary minus: -2^2 return -4 (previous versions return 4,  because unary minus processed before exponent (-4)^2.

? -2^-3^-4

-0,991479137495678

2) Previous versions return 0, because the second minus was not unary so we get 4-4 = 0. Now -2^2 return as -(2^2) and the same for the second -(2^2), so we have -4-4=-8

? -2^2-2^2

-8

Also there are more new things. But still the work is in progress

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