.figure {
    background: #eee;
    border: 2px dashed #000;
    text-align: center;
}

.ptext h3 {
    border-bottom: 1px solid #00f;
    padding-top: 30px;
}

.ptext h4 {
    padding-left: 45px;
    color: #f00;
}

.equation img {
    float: left;
}

.equation span {
    font-size: 0.8em;
}

table {
    caption-side: bottom;
}