1) 10_5_3_8_4 = 10

2) 2_1_5_3_5 = 0

3) 63_9_23_20 = 10

4) 5_4_2_12_16 = 6

5) 81_45_5_24_3 = 2​

6) (59_47_231) _81_19_2 = 20

7) 20_2_5_20_3_5_10 = 5

8) 2_5_5_8_7_4_12 = 0

9 7^2_(17_8_2_2)_10_6 = 25

10) (54_9_72)_3^2_420_21 = 682

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