eq1: (3 * x) + (4 * y) = 7
eq2: (4 * x) + (3 * y) = 7
A = Intersect(eq2, eq1)
eq3: x - y = 1
f: y = x^(2) - 3
B, C = Intersect(f, eq3)
eq4: x^(2) + y^(2) = 25
eq5: x - y = 1
D, E = Intersect(eq4, eq5)