I came accross the following css code. It is using vendor prefixes for the css calc function. As far as I remember vendor prefixes were for the left side of the style definition, basically they are vendor specific properties for new functionality in the browser but not yet standardized. I think I am correct to say that the following is not correct.
width: ~"calc(100% - 360px)";
width: ~"-webkit-calc(100% - 360px)";
width: ~"-moz-calc(100% - 360px)";