The math problem isn't easy for me to work out (保持原句意思)

The math problem isn't easy for me to work out (保持原句意思) The problem is difficult for me to work out.(保持原句意思） ---This Math problem isn’t easy for Jack to work out, is it? The computer isn’t cheap enough for me to buy.(保持原句意思) It’s difficult for me to work out the math problem(同义句改写） I think it easy for me to work out the problem的同义句 He can't work out the problem and needs your help 保持原句意思 To work out this problem is easy for me如何改为同意句（）（）（）for me t （急!）：It isn't easy for him to work out this problem.I though It was very difficult for me to work out the math problem.同义 英语句子改错：That is too hard for me to work out the math problem. I found()impossble for()to work out the math problem