If , , and are three distinct prime numbers, then what is the least common multiple of , , and ?

and a, b, c are rational numbers, then a + b + c is equal to

If a = 2·361, b = 3·263 and c = 5·624, then the value of a³ + b³ – c³ + 3abc is

If p, q, r are all real numbers, then (p – q)³ + (q – r)³ + (r – p)³ is equal to 

If x = 2 - 2^1/3 + 2^2/3, then the value of x³– 6x² + 18x + 18 is

If x = – 1, then the value of   is

and x is real, then the value of is

If x = 19 and y = 18, then the value of   is