ecuació exponencial III

e^{x}+e^{y}+e^{z}+e^{t} = e^{[x+(-1)( [y+(-1)( [z+(-t)]+t ) ]+[z+(-t)]+t )]+[y+(-1)( [z+(-t)]+t ) ]+[z+(-t)]+t}


[(-1)( [(-1)[0]]+[0] )] = ln(4/3)


e^{[(-1)( [(-1)[0]]+[0] )]}=(1/e^{[(-1)[0]]+[0]})+1 = (2/3)·(1/2)+1 = (1/3)+1 = (4/3)