$2 \sinh x \sinh y$

$2 i \sinh x \cos y$

$2 \cosh x \cos y$

$2 i \sinh x \sin y$

$\frac{15}{41}+\frac{12}{41} i$

$\frac{6}{29}+\frac{15}{29} i$

$\frac{15}{29}+\frac{6}{29} i$

$\frac{12}{41}+\frac{15}{41} i$

-1

1

$\sqrt{3}$

$\frac{1}{\sqrt{3}}$

$\left(x^4-2 x^2+25\right)\left(x^4-10 x^2+1\right)=0$

$\left(x^2-2 \sqrt{3} x+5\right)\left(x^2-2 \sqrt{3} x+1\right)=0$

$\left(x^4-2 x^2+25\right)\left(x^4+10 x^2+1\right)=0$

$\left(x^4-10 x^2+1\right)\left(x^4+2 x^2+25\right)=0$