Im trying to plot the graph of g := int(exp(-epsilon(x^4+x^2)), x = -10 .. 10), i want to see how the value of the integrand will change as we let epsilon tend towards infinity, but I am struggling to find a way to do this. Any help would be greatly appreciated.

Trying to plot cosxcoshy = 1, I am obtaining close to what i expect to see, but the graph should pass through the origin and maple is plotting it with no defined values for -0.2 < x < 0.2. The line is also not very smooth. This is what i have entered

 implicitplot(cos(x)*cosh(y) = 1, x = -3 .. 3, y = -5 .. 5)

any help would be greatly appreciated