Expand $\bigg(\large\frac{x}{6}-\frac{y}{5}\bigg)^2$

Question

$\begin{array}{1 1} \large\frac{x^2}{36} -\frac{xy}{15}+\frac{y^2}{25} \\ \large\frac{x^2}{36} +\frac{xy}{15}+\frac{y^2}{36} \\ \large\frac{x^2}{36} +\frac{y^2}{36} \\ \large\frac{x^2}{36} +\frac{xy}{15}+\frac{y^2}{25} \end{array} $