Priority levels of the operators known by Mplot++

-: MINUS AS UNARY OPERATOR
^: POWER
\: DIVISION BETWEEN INTEGER
&: MODULUS (THE REMAINDER OF THE DIVISION BETWEEN INTEGER)
%: PERCENTAGE
/: DIVISION
*: PRODUCT
-: SUBTRACTION
+: SUM.

"17%100+1"  = 17+1=18 (Look out!  a%b=b*a/100="a percent of b")
"8*2+7/5-$" = 16+1.4-3.14159...   (Look out! $ == greek pi)

The minus sign can also denote the unary operator; this operator
transforms every number into its opposite.
The minus sign is interpreted in this way when it is found at the begin
of a line or after an open parenthesis. Because the unary operator '-'
has the uppermost priority level, when you want to change the sign to
an entire expression you must enclose that between parentheses.
Currently, Mplot++ supports 32 level of parentheses.

"-8*16&4+62/7\3-(-4)+1E-2"=-8*0+62/2+4+0.01=35.01    
"exp(-2^2-4)"=exp(4-4)=exp(0)=1
"exp(-(2^2)-4)"=exp(-4-4)=exp(-8)
"exp(-(2^2-4))"=exp(-(4-4))=exp(-0)=1

Warning:
The operation of division between integers and the modulus accept also
float arguments; but you must know that float arguments are rounded to
the closest integer.
Moreover, the result's sign of the operation of modulus is equal to
the sign of the left argument while for the integer division is in force
the sign's rule.
1)    "8.2\7.6"= 8\8=1          2)    "-10.7 & 2.3"= -11 & 2=-1
3)    "8.4\(-4)"=8\(-4)=-2      4)    "10.7  & (-2.3)"= 11 & 2= 1
