Anyone can if they work hard at it.
n+1=n solve for n.
This one may be confusing its 1.12933E.2394 + 9.1879E98.234 Yet this is hard
9999,000,999,000 x 2222222 - 10 + 5 x 200
All you need to do is math, math, math! Also, in level one, go diagonal!
Feynmans path integral formulation equations
No. Some of the world's hardest maths problems have remained unsolved for centuries.
Proving the Riemann conjecture.
An algorithm is the series of steps to solve problem, so you would be looking for the series of steps to solve a math problem.
How about I tell you the first? ,Well the worlds first hardest math equation is the; P=NP equation. You should concider taking a look at it. Pretty tricky stuff!
Yes, can you?
That's hard to say.
Depends whats hard for you.