1$\left\{ \begin{array}{l} 3x^{2}+2y^{2}-xy=4\\ (5x+3y)^{2}+(x-y)^{4}=64 \end{array} \right. $2$ \left\{ \begin{array}{l} x^{2}+y^{2}+x+y=xy\\ y+y^{4}=x \end{array} \right.$
3$ \left\{ \begin{array}{l} x^{2}+y^{4}=y^{2}(x+1)\\ 2y^{4}=x+y^{2} \end{array} \right.$