The value of $\frac{d^2}{dx^2} (4x^3 - 3x^2 + 2x + 1)$ is ..... (in $x - 6$)

The sum of the series $1 + \frac{1}{4} + \frac{1}{16} + \frac{1}{64} + \dots \infty$ is

In the given figure,each box represents a function machine. $A$ function machine illustrates what it does with the input. Which of the following statements is correct?

The value of the integral $\int_{-1}^{+1} \frac{1}{t^3} \, dt$ is:

$\frac{d}{dx} \log(\log x) = $

The value of $\cos\, 120^{\circ}$ is .....