Answer: Too bad that I don't own a camera.
Explanation:
This would set up a reason for the request to have the other person's photos sent.
The complete infinitive phrase in this sentence is 'to learn methods for solving equations', because 'to learn' is the infinitive, but the rest of the phrase also has to be included.
Answer:
It means to treat the audience the way you would want to be treated.
Explanation: