A) y = log2 [(e^(-x))*cos(pi x)]

My solution was -(1+tan(pi x))/ln2

B) arctan(xy) = 1 + (x^2)y

My solution was y(2x+2x^3y^2-1)/x(1-x-x^3y^2)

They are kind of complicated and I just want to make sure I have done them right. Did anyone else get these same answers or something different? Thank you!