(\frac{y^{12}}{(-z)^{16}} = \frac{y^{12}}{z^{16}})
(\frac{y^{12}}{(-1,8d)^{51}})
(\frac{1}{(1,8d)^{51}})
(\frac{y^{12}}{(-z)^{16}} = \frac{y^{12}}{z^{16}})
(\frac{y^{12}}{(-1,8d)^{51}})
(\frac{1}{(1,8d)^{51}})