Problem with calc

[Semdevmaster]

Before: padding-top: calc(100% / (650 / 320) + 1em);
After CssMin: padding-top: calc(100% / (650 / 320)+1em); //This code does not work

According to the specification, after and before the minus and plus sign a space character is needed

[armenium-dev]

Hi.
Problem with calc(var(...))
After minimization, calc(var(...)) is removed completely.

Before:
.row > * {
padding-right: calc(var(--bs-gutter-x)/ 2);
padding-left: calc(var(--bs-gutter-x)/ 2);
margin-top: var(--bs-gutter-y);
}

After:
.row > * {}