Extract Parenthesis JS Advanced

function extract(content) {
    let textElement = document.getElementById('content').textContent;
    let regex = /\(([^)]+)\)/g;
    ///\([A-Z a-z]+\)/g;
    let arr = [];
    let matches = textElement.match(regex);
    arr.push(matches);
    let result = arr.join('; ')
    return result;
}