.mathMenu {
    display: flex;
    display: -ms-flexbox;
    flex-wrap: wrap;
    flex-direction: row;
    -ms-flex-direction: row;
    -ms-flex-wrap: wrap;
    align-content: space-around;
    margin-top: 5px;
    padding-top: 3px;
    width: 100%;
}

ol.reverse { 
    display: flex;
    flex-direction: column-reverse;
}

li.reverse {
    flex: 0 0 auto;
}