A scraper I wrote for the site - http://www.bluffton.edu/homepages/facstaff/nesterd/java/derivs.html

derivative-scraper.js

//A scraper I wrote for the site - http://www.bluffton.edu/homepages/facstaff/nesterd/java/derivs.html
//I added some extra bits, like copying it straight to your clipboard because yeah.

var elements = [];
for (var i = 0; i < 5; i++) {
    var object = {
        "html": document.getElementById("display").getElementsByClassName("base")[0].outerHTML,
        "text": document.getElementById("display").textContent.split("Enter as: ")[1]
    }
    elements.push(object);
    document.querySelectorAll("input[value=Skip]")[0].click();
}

var json = JSON.stringify(elements);
copyTextToClipboard(json);

function copyTextToClipboard(text) {
    var textArea = document.createElement("textarea");

    textArea.style.position = 'fixed';
    textArea.style.top = 0;
    textArea.style.left = 0;
    textArea.style.width = '2em';
    textArea.style.height = '2em';
    textArea.style.padding = 0;
    textArea.style.border = 'none';
    textArea.style.outline = 'none';
    textArea.style.boxShadow = 'none';
    textArea.style.background = 'transparent';
    textArea.value = text;
    document.body.appendChild(textArea);
    textArea.select();
    try {
        var successful = document.execCommand('copy');
        var msg = successful ? 'successful' : 'unsuccessful';
        console.log('Copying text command was ' + msg);
    } catch (err) {
        console.log('Oops, unable to copy');
    }
    document.body.removeChild(textArea);
}