Помогите пожалуйста)))))

$\frac{22 \times {3}^{9} - 12 \times {9}^{4} }{15 \times {9}^{4} - 18 \times {3}^{7} } = \frac{22 \times {3}^{9} -4 \times 3 \times {3}^{8}}{5 \times 3 \times {3}^{8} - 2 \times {3}^{2} \times {3}^{7} } = \frac{22 \times {3}^{9} - 4 \times {3}^{9} }{5 \times {3}^{9} - 2 \times {3}^{9} } = \frac{ {3}^{9}(22 - 4) }{ {3}^{9}(5 - 2) } = \frac{18 }{3} = 6$
Ответ: В)