If x+y=10 and xy=4, then what is the value of x⁴+y⁴=?

If a=34, b=c=33, then the value of a3+b3+c3-3abc is 

If a = 2.234, b = 3.121 and c = –5.355, then the value of $$ a^3 + b^3 + c^3 – 3abc$$ is

If x - y = 3, then what is the value of x³ - y³-9xy? 

If $$ {(x+{1 \over{x}})^{2}}=3$$, the value of of $$  {x^{206}+x^{200}+x^{90}+x^{84}+x^{18}+x^{12}+x^{6}+1}$$

If x+y+z=22 and xy+yz+zx=35, then what  is the value of (x-y)² +(y-z)²+(z-x)²?

$$ {x+{1\over{x}}}$$, then the value of $$ {x^2}+{1\over{x^2}}$$ is

If $${x}^2+{y}^2x+1=0$$ then the value of $$x^{31}+y{35}$$ is