Negation of the Boolean expression $$p \Leftrightarrow(q \Rightarrow p)$$ is

Let $$X$$ be a binomially distributed random variable with mean 4 and variance $$\frac{4}{3}$$. Then, $$54 \,P(X \leq 2)$$ is equal to :

$$ \text { The integral } \int \frac{\left(1-\frac{1}{\sqrt{3}}\right)(\cos x-\sin x)}{\left(1+\frac{2}{\sqrt{3}} \sin 2 x\right)} d x \text { is equal to } $$

The area bounded by the curves $$y=\left|x^{2}-1\right|$$ and $$y=1$$ is