Initial values: 
x = 3 20/6
y = -4 9/2
m1 = -35/10
m2 = 0
m3 = 4
m4 = -11
m5 = 0

x simplified: 6 1/3 and m1 simplified -3 1/2

Values as fractions: 
x = 19/3
y = -17/2
m1 = -7/2

Enter first number: 4 3/2
Enter second number: -1 6/5
You entered:
  x = 4 3/2
  y = -1 6/5
(x > y) is TRUE
(x >= y) is TRUE
(x != y) is TRUE

Decimal equivalent of 4 3/2 is 5.5
Decimal equivalent of -1 6/5 is -2.2

(x + y) = 3 3/10
(x - y) = 7 7/10
(x * y) = -12 1/10
(x / y) = -2 1/2
(x + 10) = 15 1/2
(x - 4) = 1 1/2
(x * -13) = -71 1/2
(x / 7) = 11/14