Area of the region bounded by the curve $$y=\tan x$$, the $$X$$-axis and line $$x=\frac{\pi}{3}$$ is

The area of the region bounded by $$y=-\sqrt{16-x^2}$$ and $$X$$-axis is

The area of the region bounded by the curve $$y^2=8 x$$ and the line $$y=2 x$$ is

The area of the region bounded by the line $$y=2 x+1, X$$-axis and the ordinates $$x=-1$$ and $$x=1$$ is