.frac {
    display: inline-block;
    position: relative;
    vertical-align: middle;
    letter-spacing: 0.001em;
    text-align: center;
padding-left: 0.5rem;
}
.frac > span {
    display: block;
    padding: 0.1em;
}
.frac span.bottom {
    border-top: thin solid black;
}
.frac span.symbol {
    display: none;
} 
.equation1 var {
    font-style: italic;    
font-family: inherit!important;
font-size: inherit!important;
}
.equation1{
font-family: Symbola-mq,"Times New Roman",serif;
}
s{
    text-decoration: overline;
}