Just numbers
Super Easy
Easy
Hard
Difficult
100

2x28

56

100

2(x+1)

2x+2

100

4(r-3)

4r-12
100

-6(1-r)

-6+r

100

x(1+y)

x+xy

200

5x18

90

200

3(x+2)

3x+6
200

7(w-4)

7w-28

200

-8(4-t)

-32+8t

200

-t(3+g)

-3t-tg

300

7x53

371

300

8(y+3)

8y+24

300

10(m-11)

10m-110

300

-5(2-3x)

-10+15x

300

4(1-x+y)

4-4x+4y

400

8x34

272

400

7(t+6)

7t+42

400

9(p-13)

9p-117

400

-7(6-8s)

-42+56s

400

11(4-e+f)

44-11e+11f

500

7x93

651

500

12(x+5)

12x+60

500

15(x-20)

15x-300

500

13(2-5f)

-26+65f

500

7(3+2e-6f+3y)

21+14e-42f+21y

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