Yes, Dimitra is correct in fact in English the names of sciences are treated as singular even when they appear plural. Here are some reliable references:
https://www.grammarly.com/blog/countable-and-uncountable-nouns/The plural verb are does not appear to agree with the singular subject Mathematics. Consider changing the verb form for subject-verb agreement.
https://www.englishgrammar.org › Nouns
Now, it should be noted that there is one situation where you will find a plural verb with mathematics: e.g. "His mathematics were faulty." But this is not the meaning of a scientific field but of "calculations".
Hope these helps. There are many other sources which I've collected over the years as a proofreader but I think these should suffice.
Both singular and plural are used (I'm not even sure if plural is correct), with singular being the most popular one in use. Keep in mind that Mathematics is considered to be a mass noun. ^.^
Both "diffcult" and "hard" are equivalent and should be accepted in this translation
Please excuse the spelling error but I used hard and my translation was rejected...I also think that Mathematics ARE hard should be accepted
I used hard and my translation was rejected
It shouldn't have been... did you happen to capture a screenshot showing the question, your answer, and the error message? That would be helpful for finding out what might have happened.
I also think that Mathematics ARE hard should be accepted
I disagree; Mathematics as a subject takes a singular verb (chemistry is easy, biology is easy, physics is easy, mathematics is hard).