You are so smart. You can finish that difficult Maths problem in only five minutes.
你真聪明，可以在5分钟之内就解出那道数学难题。
This maths problem seems more difficult than that one.
这道数学题比那道似乎要难些。
That maths problem was so difficult that I spent two hours working it out.
那道数学题真难，我用了两个小时才做出来。
This maths problem seems difficult to work out.
这道数学题似乎很难解。
But it is very difficult to use a formula in working out a maths problem.
但用公式解决某个数学问题却很难。
The maths problem is so difficult that nobody in our class can work it out.
这道数学题太难，我们班上没人算得出。
The maths problem seems to be very difficult to work out.
这道数学题似乎很难解决。
It was too difficult for me to work out the maths problem.
这道数学题太难了，我算不出。
The maths problem is too difficult for me to work out.
这道数学题太难我解不出来。
The maths problem is too difficult for me to work out.
这道数学题太难我解不出来。
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