body {background: #d9e3f8}
txt {margin-left: 15px; margin-right: 15px; font-family: 'Times New Roman'; font-size: 37px; border: 4mm ridge rgba(117, 142, 255, 0.705)}
.grades {text-align: center ;}
h1 {text-align: center; font-family: 'Times New Roman'; font-size: 60px; color:#1a1b3d}
h2 {text-align: left; font-family: 'Times New Roman'; font-size: 30px; color:#011a66; margin-left: 30px; margin-right: 30px; padding: 10px; border: 7px solid #01081d}
h3 {text-align: center; font-family: 'Times New Roman'; font-size: 50px; color:#011a66;text-decoration: underline double;}
h4 {text-align: left; font-family: 'Times New Roman'; font-size: 30px; color:#011a66}
.ax {padding: 10px; margin-left: 30px; margin-right: 30px; border: 7px solid #01081d}
h5 {text-decoration: underline; font-style: italic; text-align: center; font-family: 'Times New Roman'; font-size: 35px; color:#011a66}
li { font-family: 'Times New Roman'; font-size: 35px; color:#011a66}
p {text-align: left; font-family: 'Times New Roman'; font-size: 45px; color:#011a66}
.ox {padding: 10px; margin-left: 30px; margin-right: 30px;}
y {font-weight: normal; font-size: normal;}
.fraction {display:inline-block; text-align: center; vertical-align: middle;}
.fraction span {display: block; padding: 0 5px;}
.fraction .top {border-bottom: 2px solid black;}
.no-wrap {white-space: nowrap;}

.formula {
font-size: 1.5rem;
text-align: center;
margin: 30px 0;
font-family: 'Times New Roman', serif;
}

.fraction1 {
display: inline-flex;
flex-direction: column;
align-items: center;
vertical-align: middle;
margin: 0 5px;
}

.numerator {
border-bottom: 2px solid black;
padding: 0 8px;
}

.denominator {
padding: 0 8px;
}

.sqrt {
display: inline-flex;
align-items: center;
vertical-align: middle;
}

.sqrt-sign {
font-size: 1.4em;
margin-right: 3px;
}

.sqrt-content {
border-top: 2px solid black;
padding: 0 5px;
}