Question

(2^3)^2-42-(1/2)^2=87/4

Answer 1

(2³)² - 42 - (1/2)² = 87/4

(2)^3.2 = 2^6 - 42 - (1²/2² = 1/4) = 87/4
2^6 - 42 - 1/4 = 87/4
64 - 42 - 1/4 = 87/4
22-1/4 = 87/4

22.4 - 4
-------------
4

88 - 4
--------
4

84
----
4

42
----
2

== > 21

21 = 87/4