Question

What is `4\times ( 13+ 8)- 8^{2} -:( 2\times 4)`?

Answer 1

`76`

Explanation:

Always count the number of terms first.
Each term simplifies to a single answer and these are added or subtracted in the last step.

Within each term the normal order of operation applies.
Brackets, then:
the strongest operations of powers and roots
Multiply and divide
You may do more than one calculation in a line.

`[4xx color(tomato)((13+ 8))]- [color(blue)(8^2) div color(lime)((2xx 4))]" "larr` there are 2 terms

=`" "4xx color(tomato)(21)color(white)(xxxxx)- color(blue)(64) div color(lime)(8)" "larr` keep the terms separate

=`" "84 color(white)(xxxxxxxx) -8`

=`" "76`