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

If a + b – c = 0 then the value of 2b²c² + 2c²a² + 2a²b² –a⁴ – b⁴ – c⁴

then the value of :  

if ,then find the value of  

Find the radius of the circle x²+y²-4x+6y=12

If x = 2 then the value of x³ + 27x² + 243x + 631 is

If (3x – 2y) : (2x + 3y) = 5 : 6, then one of the values of is

If x = – 1, then the value of   is