Auto detect calc()

[skttl]

Don't know if it is possible at all, but I have writing calc() in my arbitraries, like eg. w-[calc(100%/3+(var(--spacing)*3))]. Would be much nicer if arbitraries could somehow detect a calc statement like w-{100%/3+(var(--spacing)*3)}, or even simpler w-{100%/3+(--spacing*3)} where it would auto detect the variable too.