Find the partial derivative fxyf_{xy}fxy for f(x,y)=exyf(x, y) = e^{xy}f(x,y)=exy.
exy(1+xy)e^{xy}(1+xy)exy(1+xy)
exye^{xy}exy
xexyx e^{xy}xexy
yexyy e^{xy}yexy