1. Updated readme

2. Updated bench_expr.txt
3. Cleanup for muParserX benchmark
4. Updated ExprTk

Author: ArashPartow

bench_expr.txt

@@ -38,7 +38,7 @@ a^2+1
 
 # hornerschema:
 (((((((7*a+6)*a+5)*a+4)*a+3)*a+2)*a+1)*a+0.1)
-7*a^7 + 6*a^6 + 5*a^5 + 4*a^4 + 3*a^3 + 2*a^2 + 1*a^1 + 0.1
+7*a^7+6*a^6+5*a^5+4*a^4+3*a^3+2*a^2+1*a^1+0.1
 
 # distance calculation
 sqrt(a^2+b^2)
@@ -75,6 +75,9 @@ a*2+2*b
 a*-b
 a/-b
 (a/((((b+(((e*(((((pi*((((3.45*((pi+a)+pi))+b)+b)*a))+0.68)+e)+a)/a))+a)+b))+b)*a)-pi))
+(5.5+a)+(2*a-2/3*b)*(a/3+b/4)+(c+7.7)
+((((a)-(b))+((c)-(x)))/(((y)-(z))+((w)-(a))))*((((b)-(c))+((x)-(y)))/(((z)-(w))+((a)-(b))))
+((((2*a)-(b*3))+((4*c)-(x*5)))/(((y/6)-(7/z))+((w/8)-(a^2))))*((((b^3)-(c/4))+((5/x)-(6/y)))/(((z/7)-(8/w))+((a)-(b))))
 
 # expressions with functions
 a+(cos(b-sin(2/a*pi))-sin(a-cos(2*b/pi)))-b