Question

1) Simply
31-[12+(3 x 10÷2))​

Answer 1

Answer:

$31-[12+(3 *10/2))​$

$=-26$

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$\mathcal{BY \:ROSHAN\: A \:USER \: OF \: BRAINLY}$

Answer 2

Answer:

31-[12+(3*10/2)]

31-[12+(3*5)]

32-[12+15]

31-27

4

Note: Follow Bodmas rule .