Addition/subtraction
Grouping like terms
Distributive property
Translating algebra
100

7+9

16

100

3x+9x

12x

100

2(n+2)

2n+4 

100

8 less than b

b-8

200

9-6+7

10

200

-4x-8x+4

-12x+4

200

3(6n-6)

18n-18

200

The difference between 4 and 5

4-5

300

7-10-3

-6

300

-3x+7+4x-8

x-1

300

5(3n-2) + (n+2)

16n-8

300

The sum of a and 3, multiplied by 2

(a+3)(2)

400

-7-7+3-4

-15

400

-7x+12+3x-5x+3

-9x+15

400

-2(n+4) + 4(2n-5)

6n-28

400

The sum of the double of b and the triple of a

2b+3a

500

-8-5+3-11-10

-31

500

-3x-5x+4-8x-8+3+5x

-11x-1

500

-3(2n-4) - 5(-3n-2)

9n+22

500

The square of the difference of b and 3

(b - 3)2