Step 1: Go to Exai.com.
Step 2: Click the login button (A).
Step 3: Either insert your email and password into the required fields of the normal login (B)
Or Click the Facebook login button to login with Facebook (C).
Step 4: Congratulations you have logged into Exai!
Note: If you are already logged into Exai, then the Login button will be switched to a Log Out button.