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Evaluating Expressions
Contributed by: Basi
1. Evaluate a + b if a = 7 and b = 3.
a + b =
2. Evaluate a - b if a = 8 and b = 2.
a - b =
3. Evaluate ab if a = 3 and b = -5.
ab =
4. Evaluate 2a + b if a = 4 and b = -8.
2a + b =
5. Evaluate abc if a = 4, b = 5 and c = 2.
abc =
6. Evaluate 4yz - 5 if y = 2 and z = 10.
4yz - 5 =
7. Evaluate y - z if y = -2 and z = -6.
y - z =
8. Evaluate -a - b - ab if a = -3 and b = -4.
-a - b - ab=
9. Evaluate -x - (-a + b)
    if x = 2, a = -4 and b = -6.
-x - (-a + b) =
10. Evaluate mx + b if m = -2, x = 4 and b = -3.
mx + b =
11. Evaluate -(m + x)(-a + mx)
      if m = 2, x = -3 and a = -4.
-(m + x)(-a + mx) =
12. Evaluate -xa(x - a) + a
      if x = 4 and a = -2.
-xa(x - a) + a =
13. Evaluate x - xy if x = -2 and y = 3.
x - xy =
14. Evaluate a - (ab - a) if a = -4 and b = -2.
a - (ab - a) =
15. Evaluate x - ab(a - b)
      if x = -3, a = -2 and b = -4.
x - ab(a - b) =
16. Evaluate -xa(a + x) + x
      if x = -4 and a = -2.
-xa(a + x) + x =
17. Evaluate xm - 2m if x = -2 and m = -3.
xm - 2m =
18. Evaluate 2abc - 3ab
      if a = 2, b = -3 and c = 4.
2abc - 3ab  =
19. Evaluate a2 - b if a = 4 and b = -8.
a2 - b =
20. Evaluate a2 + b2 if a = -3 and b = -7.
a2 + b2 =
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