@Supports css calc function

Question

Is there a way to use the calc function in @ supports (propertyName, value) ? I mean <supports_condition>- only for calc function.

@supports ( <supports_condition> ) {
    .col-3 {
    width: calc(25% - 20px/4)
    }
    .col-4 {
        width: calc(33.3333333% - 20px/3)
    }
    .col-6 {
        width: calc(50% - 20px/2)
    }
}

Answer 1

@supports , calc(), ( IE @supports , calc() 9, 4 ), , , @supports, , , calc(), @supports, . , , , calc(), - .

, calc() , @supports , , calc() :

width: 95px;
width: calc(25% - 20px/4);

Answer 2

, - calc @support, , , . - : JS Fiddle

@supports (width: calc(100% - 80em)) {
    div {
        width: calc(100% - 3em);
    }
}

. Mozilla.