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%var x y z
g = golden_ratio
p = 2 - (cos(x + g*y) + cos(x - g*y) + cos(y + g*z) +
         cos(y - g*z) + cos(z - g*x) + cos(z + g*x))
show(p)
−cos⁡(ϕx+z)−cos⁡(−ϕx+z)−cos⁡(ϕy+x)−cos⁡(−ϕy+x)−cos⁡(ϕz+y)−cos⁡(−ϕz+y)+2\displaystyle -\cos\left(\phi x + z\right) - \cos\left(-\phi x + z\right) - \cos\left(\phi y + x\right) - \cos\left(-\phi y + x\right) - \cos\left(\phi z + y\right) - \cos\left(-\phi z + y\right) + 2
latex(p)
-\cos\left(\phi x + z\right) - \cos\left(-\phi x + z\right) - \cos\left(\phi y + x\right) - \cos\left(-\phi y + x\right) - \cos\left(\phi z + y\right) - \cos\left(-\phi z + y\right) + 2 
%md(hide=False)
Consider $\cos(x + \phi y)$...

Consider cos⁡(x+ϕy)\cos(x + \phi y)...

%latex
Consider $\cos(x + \phi y)$...