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If x = (2+√3)/(2-√3), y = (2-√3)/(2+√3). Then find out the value of (x²+y²-xy)/(x²+y²+xy)?

if √1+x/121 = 13/11 then find the value of x.

If, p³ + q³= 485 and (p + q = 5), then find the value of [(1/p) + (1/q)]

If 1/(x+ 1/(y+ 1/z)) = 13/30, then find x+y+z= ?

If x^2a = y^2b =z^2c≠ 0 and x²= yz, then the value of (ab + bc + ca) /bc is :

(123×123×123 + 130×130×130)/(123×123 - 123×130 + 130×130) = ? 

What is the simplified form of the expression?

(1 + x) (1 + x²) (1 + x⁴) (1 + x⁸) (1 – x)?

A.(1-x⁴⁰)

If a =-10, b= -6 and c=18, then what is the value of (3abc)/4.