$f(-1)+2 f(2)-3 f(1)$

$H(-1)+f(2)+g(3)$

$g(-1)+2 g(2)-3 g(1)$

$H(1)+2 f(2)-g(1)$

$\frac{1}{2} \log \left[\frac{(3+2 \sqrt{2})(2-\sqrt{3})}{\sqrt{3}}\right]$

$\frac{1}{2} \log \left[\frac{(3-2 \sqrt{2})(2+\sqrt{3})}{\sqrt{3}}\right]$

$\log \left[\frac{(3-2 \sqrt{2})(2-\sqrt{3})}{\sqrt{3}}\right]$

$\log \left[\frac{(3+2 \sqrt{2})(2-\sqrt{3})}{\sqrt{3}}\right]$

$\frac{\pi}{2}+\frac{1}{2} \log 2$

$\frac{\pi}{4}-\frac{1}{2} \log 2$

$\frac{\pi}{4}$

$\frac{3 \pi}{4}+\log 2$

$\frac{\pi^2}{4}$

$\frac{\pi}{2}$

$\frac{\pi^2}{2}$

$\frac{\pi}{4}$