Chyba:
CuSO4 %2B NH3 %2B H2O %3D %5BCu%28NH3%294%5DSO4*H2O
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Neočakávaný ('%')CuSO4 %2B NH3 %2B H2O %3D %5BCu%28NH3%294%5DSO4*H2O
^
Neočakávaný ('%')