To answer your question about the little number on the top right corner of another number or bracket is an exponent, An exponent is a short cut for writing multiplying many things that are the same together. The exponent tells us how many times each thing that is the same is multiplied.
For example: 2^{4}=2x2x2x2 = 16. The exponent 4 tells us that 2 is multplied by itself 4 times.
When expressions have more than one operation, we have to follow rules for the order of operations which is also known as BEDMAS:
Brackets  First do all operations that lie inside brackets (also known as parentheses).
Exponents  Next, do any work with exponents or radicals.
Multiplication & Division  Working from left to right, evaluate any multiplication and division.
Addition & Subtraction  Finally, working from left to right, do all addition and subtraction.
An example of an expression with all of the above operations is 4 x (62)^{2}÷(31)^{3}7
4 x (62)^{2}÷(31)^{3}7 

4 x (4)^{2}÷(2)^{3}7 
First I worked inside the brackets: 62=4 and 31=2 
4 x 16^{}÷8^{}7 
Next I worked with my exponents: 4^{2}=4x4=16 and 2^{3}=2x2x2=8 
64^{}÷8^{}7 
Working from left to right, I multiply and divide: 4x16=64 
8^{}7 
Working from left to right, I multiply and divide:64^{}÷8 = 8 
1 
Last I add or subtract: 87=1 
Remember that when you are working within the brackets to also follow the BEDMAS rules. For example: 4x[3^{2}(4+5)]
4x[3^{2}(4+3)] 

4x[3^{2}7] 
First I worked inside the brackets and notice another set of brackets so I will start there first: 4+3=7 
4x[9^{}7] 
Next I worked with my exponent within the bracket: 3^{2}=9 
4x2 
Next there is no multiplication or division in the brackets so I will subtract: 97=2 
8^{} 
The only operation that is left is multiplication: 4x2=8 


Hope this helps. Good luck with the new school year!
Janice
