1/2 + 2/3
// 7/6 (approx. 1.1666666666666667)

1/2 + 1/2
// 1

5/sextillion + 3/quadrillion
// 600001/200000000000000000000 (exactly 3.000005e-15)

8^(1/3)
// 2    (note the exact integer result.)