Which of the Programming Language is not in use

Find ‘x’ if (x³+3x)/(3x²+1) = 189/61

If 3y-3/y=18 then find the value of y² +1/y²

Simplify the following expression:  (8x - 6y - 5z)  ²

If (a – 8) ²  + (b + 2)  ²  + (c – 3) ²  = 0, then find the value √(a +b + c).

If x + y + z = 9 and (x² + y² + z²) = 21, then find the value of (xy + yz + zx)

If 'a' = 2 + √3, then find the value of [a² - (1/a²)].

If A = (7)^1/3 + (7) ^-1/3, then the value of {3A³ – 9A} will be:

Find the value of ‘x’ in the given expression

(49/16)^x × (64/343)^x-1 = 4/7

If 70% of ‘y’ is 25% more than 30% of 140, then value of ‘y’ is: