order of operations
mutiply
exponints
100

6 x 6 + 4

40

100

4 x 6

24

100

2=

8

200

6 +(4+ 6)

16

200

4 x 25

100

300

5(7+6)

65

300

2 x 4

8

400

4 x 5(4+1)

100

400

6x = 36

x = 6

500

5 + 6+ 1

42

500

4 x 6 x 2

48