Question

{[(8/9 - 2/7). 9/12+(1-2/7)]- 1/2}+(3 - 1/4 .8/3)/7

Answer 1

$((( \frac{8}{9} - \frac{2}{7}) \times \frac{9}{12} + (1 - \frac{2}{7} )) - \frac{1}{2} ) + \frac{(3 - \frac{1}{4} \times \frac{8}{3} )}{7} \\ ((( \frac{56 - 18}{63}) \times \frac{9}{12} + ( \frac{7 - 2}{7} )) - \frac{1}{2} ) + \frac{(3 - \frac{8}{12}) }{7} \\ ((\frac{38}{63} \times \frac{9}{12} + \frac{5}{7} ) - \frac{1}{2} ) + \frac{\frac{36 - 8}{12} }{7} \\ (( \frac{342}{756} + \frac{5}{7} ) - \frac{1}{2}) + \frac{ \frac{28}{12} }{7} \\ ( \frac{342 +540 }{756} - \frac{1}{2} ) + \frac{28}{12} \times \frac{1}{7} \\ ( \frac{882}{756} - \frac{1}{2} ) + \frac{28}{84} \\ ( \frac{882 - 378}{756} ) + \frac{28}{84} \\ \frac{504}{756} + \frac{28}{84} \: \: \: \: dividindo \: tudo \: por \: 4 \\ \frac{126}{189} + \frac{7}{21} \\ \frac{126 +63}{189} \\ \frac{189}{189} \\ 1$
Mas que droga de conta! Nem me espantaria se tivesse errada! Porém, uma delícia de se fazer