lim (-1 - sin(x) + tan(x))
x->0+
$$\lim_{x \to 0^+}\left(\left(- \sin{\left(x \right)} - 1\right) + \tan{\left(x \right)}\right)$$
lim (-1 - sin(x) + tan(x))
x->0-
$$\lim_{x \to 0^-}\left(\left(- \sin{\left(x \right)} - 1\right) + \tan{\left(x \right)}\right)$$