[tex]\displaystyle\bf\\\frac{(-3)^{17}\cdot(-4)-2\cdot(-3)^{16} }{9^{7} \cdot 15} =\frac{3^{17}\cdot 4-2\cdot 3^{16} }{(3^{2})^{7} \cdot 3\cdot 5} =\\\\\\=\frac{2\cdot 3^{16}\cdot (3\cdot2-1) }{3^{14}\cdot 3\cdot 5} =\frac{2\cdot 3^{16}\cdot 5 }{3^{15}\cdot 5} =2\cdot 3=6\\\\\\Otvet \ : \ B[/tex]
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[tex]\displaystyle\bf\\\frac{(-3)^{17}\cdot(-4)-2\cdot(-3)^{16} }{9^{7} \cdot 15} =\frac{3^{17}\cdot 4-2\cdot 3^{16} }{(3^{2})^{7} \cdot 3\cdot 5} =\\\\\\=\frac{2\cdot 3^{16}\cdot (3\cdot2-1) }{3^{14}\cdot 3\cdot 5} =\frac{2\cdot 3^{16}\cdot 5 }{3^{15}\cdot 5} =2\cdot 3=6\\\\\\Otvet \ : \ B[/tex]