Changping Wang, MA
Active since 2003
"Thanks for doing this I have another similar questions. If you are interested I can post it to you"
"Thanks! Let me know if you want to help out for a derivation for the same problem but this time only for the integration version?"
"Thank you. Can I please trouble you to show all work for the first problem?
(x + 3)(x − 5) < 0"
"I would like for you to be my expect. I will save your ID. Thanks a million times."