title: Time Complexity of Addition
body: <p>I am new to calculating time complexity. I know if we have constant term we neglect that and if we have equation we take the highest power of the term like x^3+2x^2+n will have O(n^3). But what do we do when we have addition of these complexities? Like to be specific What is the time complexity of O(n) + O(sqrt(n)).</p>