# calculus – Is this claim true about the number of roots of the given function?

I have this function of order $$4$$ in $$x$$ for $$-infty
$$Big((5 x^2-3) sinh ;(5 x)Big)^2-Big(3 (2 x^2+1) tanh ;(-x)Big)^2$$

Now, since the function is even, and since the functions $$sinh(x)$$ and $$tanh(x)$$ are not periodic, can we claim that it is obvious that the function has $$4$$ real roots, $$2$$ of them positive, and two of them negative?