$$[\frac{-X}{Y}]X[\frac{-X}{Y})^{11}$$
$\left(\frac{x}{y}\right)^{x+12}$
$\frac{\left(\ln(\frac{x}{y})x+x+12\right)x^{11}\times \left(\frac{x}{y}\right)^{x}}{y^{12}}$
