$$\frac{\left( - 9 \right)z + \left( 6 \right)\text{zx} + x^{3}}{5 - 10 + 10}$$
$$\frac{12x + 19y + x^{1} + y + y + y}{x^{2} + y^{2}}$$
3z + 4y + 1z6 + 34y