$$\int \frac{x^3-7 x+6}{x^2+3 x} \mathrm{~d} x=$$

The cumulative distribution function of a discrete random variable X is given by

Then $\mathrm{E(X^2)=}$

A five digit number divisible by 3 is to be formed using the digits $0,1,2,3,4,5$ without repetition, then the total number of ways this can be done is

The statement $\sim(p \leftrightarrow \sim q)$ is