2^3 is equivalent because if you count the number of twos there are in the parentheses its 3.
2/1 or 2
either or is correct, just depends on how your teacher prefers your answers to be
What is that other number to the right of the red and I can answer it
The equation (form) is: 
The solution of the equation is: 
Explanation:
First, let's call the number we are going to solve for "x".
Then two thirds of this number can be written as:

Then "plus 4" means add 4 we get:

"is 7" means that the above expression is equal to 7 (as follows):

The solution of the above equation is:

Answer:
(2n - 7) - 10
Step-by-step explanation:
(2n - 7) represents "difference of 2 times a number and 7"
- 10 represents "10 less"