Question

b=(-7)5. (-7)12 : [(-7)3]5 + 13=​

Answer 1

$b=(-7) \times 5 \times (-7)12 : [(-7)3] \times 5 + 13$

$b=(-7)×5×(-7)×12÷(-21)×5+13$

$b = - 700 + 13$

$b = - 687$