Find an equation of the tangent line to the curve at the point (1, 1).

y= ln (xe^x^4)

in order to find the slope i take the derivative so i use product and chain rule, it become (1/xe^x^4)(1(ex)^4+4x(ex)^3(ex)) and i know once i get the slope i can just use y-y1=m(x-x1) but somehow the slope is not right? is it the step i take the derivative wrong?