if `y = e^((x)^(e^x)) + x^(e^(e^x)) + e^(x^(x^e))`, then dy/dx`=e^((x)^(e^x)) x^(e^x)[e^xlogx+e^x/x]+ x^(e^(e^x)) e^(e^x)[1/x+e^xlogx]+e^(x^(x^e))x^(x^e)x^(e-1)[1+elogx]`