cos(x)*sinh(x) - cosh(x)*sin(x)
$$- \sin{\left(x \right)} \cosh{\left(x \right)} + \cos{\left(x \right)} \sinh{\left(x \right)}$$
$$- 2 \sin{\left(x \right)} \sinh{\left(x \right)}$$
-2*(cos(x)*sinh(x) + cosh(x)*sin(x))
$$- 2 \left(\sin{\left(x \right)} \cosh{\left(x \right)} + \cos{\left(x \right)} \sinh{\left(x \right)}\right)$$
-2*(cos(x)*sinh(x) + cosh(x)*sin(x))
$$- 2 \left(\sin{\left(x \right)} \cosh{\left(x \right)} + \cos{\left(x \right)} \sinh{\left(x \right)}\right)$$