$$\int \frac{\cos x+x \sin x}{x^2+x \cos x} d x=$$ ...........

A stone is dropped into a pond. Waves in the form of circles are generated and radius of outermost ripple increases at the rate of $5 \mathrm{~cm} / \mathrm{sec}$. Then area increased after 2 seconds is ............

If $f(x)=3 x-2$ and $g(x)=x^2$, then $(f \circ g)(x)=$

Which of the following is not equivalent to $p \rightarrow q$.