In the past, apps such as Photmath have assisted users solve math problems. A relatively new site (as well as an app) is Sizzle.
When you open SIzzle you will see the image below. You can type in the question at the bottom as well as the option to upload an image as well as use a QR code to share an image from your phone. All of this without signing in!
If you would like more options, make sure to select Start Solving (upper right).
You will then see the image you see below (as well as the option to sign up).
Embedded below is a 2 minute and 6 second YouTube tutorial.
Take care,
Brad