[tex]200-\left[17\times \:3-\left(8\times \:10\div \:8+7\times \:8\right)\div \:66\right]\div \:5=200-[=17\times \:3-66\div \:66]\div \:5 = 200-[51-66\div \:66]\div \:5 = 200 - [51-1]\div \:5 = 200 - [50]\div \:5 = 200 - 50\div \:5 = 200-10 = 190[/tex]
