some pde have simple solution but both mma and maple only give very complicated solution, which is very hard to test. e.g. problem number 168.

one click the dsolve button to solve it and then one click the test button to test the solution in mathHand.com

http://server.drhuang.com/input/?guess=dsolve%28ds%28y%2Ct%29%3D0.1+*ds%28y%2Cx%2C2%29%2By%29&inp=ds%28y%2Ct%29%3D0.1+*ds%28y%2Cx%2C2%29%2By&lang=null

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