Question: How to simplify assuming real domain?

Question deleted since it tagged duplicate. Will go search for the duplicate. I did not know there was duplicate one.


Here is original question. If moderator thinks it is duplicate feel free to delete. 

I would like to duplicate this simplification done in Mathematica, but in Maple. Mathematica will cancel the exponential term automatically if told the domain is real, but in Maple it willl not.

My attempts in Maple which all fail


ode := diff(v(x), x, x)*exp(x^2) = 0;
simplify(ode) assuming real; #there is no such type
simplify(ode) assuming x::positive;
use RealDomain in simplify(ode) end use;

How to cancel the exponential term from the above equation in Maple?

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