Answer:
= 9
Step by step solved:
To solve this problem, we need to use the order of operations (PEMDAS), which dictates that we perform the operations in the following order: parentheses, exponents, multiplication and division (from left to right), and addition and subtraction (from left to right).
Using this rule, we can simplify the expression as follows:
(5x5-14:2):(45:5-21:3)
(25 - 7):(9 - 7)
18:2
9
Therefore, the value of the expression (5x5-14:2):(45:5-21:3) is 9.