simple simplifying
100

(12x-3x+1x2)divided by 2=?

5x2

200

2w+5wx10=?

52w

300

10s+10s+1v x5=?

20s+5v

400

12x12-12+12a2?

132+12a2

500

67+212-37+37a=?

242+37a

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