apply help

i' physics syudent in iran. i cannot use mastercard because of sanction of usa. so i cannot give arfken physics solution. what can i do to give it? please dont answer as a politicman. i have a scince problem and i want your human help.

start again

this blog is created a few years ago and i dont use it because of unknowning english. i'm now better and i want post expalaintion of physics topics.