can you provide a holistic ranking of the following equations based on your evaluation of 1. their interpretability, 2. their plausibility as an equation for a naturally occuring phenomenon. Please follow the principle of Occam's Razor. I have provided the equations.
 
1. x**2 - x*sin(x**2/sin(x + sin(x))) - cos(sin(x))
2. (-x*cos(x) + (x - sin(sin(sin(x))))*sin(cos((x + sin(sin(x)))*sin(sin(2*x**2*sin(x))))))/x
3. -sin(x)/sin(sin(x)) + sin(sin(sin(sin(x*sin(x**2))))/x)
4. -2*cos(x) + cos(x**2)
5. -cos(2*x - sin(x)*cos(cos(x))/cos(sin(x)*cos(sin(1))/cos(sin(x)*cos(sin(1))/cos(x**3*(2 - cos(cos(x))/cos(x*sin(x)))))))
6. sin(x**2)*cos(x) - 1
7. -cos(x)*cos(x*cos(x))

Please return your ranking in a python list.