[question] How to plot mathematical expression

[malnaanah]

I have the following script that plot cos(x) function and I want to plot more complex math expression like (1 + cos(1/x)) or (cos(x) * exp(-x)) , but I don't know how.

#import "@preview/cetz:0.2.2": canvas,plot
#canvas(length: 1cm, {
plot.plot(size: (4,2), x-tick-step: none,axis-style: none,y-tick-step: none, x-grid: false,y-grid: false , {plot.add(domain: (0, 4*calc.pi), calc.cos ) })
})

[malnaanah]

[Answer]
I found how to write an expression. Instead of calc.cos I have to write something like x => calc.cos(5 * x) * calc.exp(-0.5 * x)

Thank you for this great tool.