If a + b + c = 6, a³ + b³+c³-3abc=342, then what is the value of ab + bc + ca?

If $$x+{1\over x}=c{1\over c}$$ then the value of x

If a + b + c = 6, a² + b² + c² = 14 and a³ + b³ + c³ = 36, then the value of abc is

if $${{x^{24}+1}\over x^{12}}=7$$ then the value of   $${{x^{72}+1}\over x^{36}}$$ is

If  $$n+{2\over 3}n+{1\over2}n+{1\over7}n=97$$ then the value of n is : 

If   $$ a={b^2\over b-a} $$  then the value of a³ + b³ is 

If x = – 1, then the value of   $$ {1\over x^{99}}+{1\over x^{98}}+{1\over x^{97}}+{1\over x^{96}}+{1\over x^{95}}+{1\over x^{94}}+x $$ is

if $$a+{1\over a}=5$$, then what is the value of $$a^3+{1\over a^3}$$