Question

[35/(25-5*4)]-{225/{(5*6-5)(729/81)}=

Answer 1

Consider the expressions separately:

$\frac{35}{25-5*4}= \frac{35}{25-20}=\frac{35}{5}=7$

$\frac{225}{( 5*6-5 )( \frac{729}{81} )}= \frac{225}{( 30-5 )( 9 )}= \frac{225}{( 25 )( 9 )}= \frac{9}{9}=1$

So:$\frac{35}{25-5*4}-\frac{225}{( 5*6-5 )( \frac{729}{81} )}=1-7=-6$