.parens {

border: 2px solid #000000;
margin: 1px 3px 16 3;
width: 36;
padding: 2px 36px;

} .more-parens {

padding: 8 4 4 4px;
width: 96;
height: 113;
margin: 12;

} .nested-parens {

width: 71;
height: 6;

} .mixed-units {

margin: 2px 4em 1 5pc;
padding: 6px 1em 2px 2;

}