https://s0.wp.com/latex.php?latex=%5Cdisplaystyle++%7C%5CDelta%28%5Calpha%3B+a%5C+%28q%29%29%7C+%5Cll+%5Cfrac%7Bx%7D%7Bq%7D+%5Ctau%28q%29%5E%7BO%281%29%7D+%5Clog%5E%7B-A_0%2F2%2BO%281%29%7D+x&bg=ffffff&fg=000000&s=0&c=20201002