a = (4 x 7 - 3 x 8 + 2) : 2
a = (28 - 24 + 2) : 2
a = (4 + 2) : 2
a = 6 : 2
a = 3
b = 11 - [17 - (3^2 - 2^3 + 2 x 4)]
b = 11 - [17 - (9 - 8 + 8)
b = 11 - (17 - 9)
b = 11 - 8
b = 3
c = {[8 x 10^2 + 7 x 10^2 x (6 x 10^2 - 5 x 10^2 - 5 x 10^2)] : 50 - 1416}^100
c = {[800 + 700 x (600 - 500 - 500)] : 50 - 1416}^100
c = (800 + 700 x 600):50 - 1416)^100
c = (420800 : 50 - 1416)^100
c = 7000^100
