eq1: (3 * x) + (4 * y) = 7
eq2: (4 * x) + (3 * y) = 7
A = Intersect(eq1, eq2)
eq3: x - y = 1
f: y = (x * x) - 3
B, C = Intersect(f, eq3)
eq4: x + y = 13
g: y = 40 / x
D = Intersect(g, eq4, (5, 8))
eq5: (y * y) = 25 - (x * x)
eq6: x - y = 1
E, F = Intersect(eq5, eq6)