a = 123
b = 1 - 2 * 3 + 4 % 5 * 6 - 7
c = -3 - b * -5

- ((a * b) -- (a + b)) /- (c--c)

x1 = a / b - 1
x2 = a % b - 1
y = (x1 * x1 + x2 * x2) / (x1 * x2 + -1)

_b = -(-b)
b = \
    4 \
      + ( (14 * (6 + b + 2 * 16)) + 9 ) \
          * (11 * (b + b) + 15 * 8 * (b + 1)) \
          * 19 \
      + 5 * 18 \
      + 1 \
      + 10 * (7 + 17) \
      + c \
      - 37
-b

z = x + y
