Răspuns:
Explicație pas cu pas:
3 × ( 1 + 2 ) × 4 + 1 = 3 × 3 × 4 + 1 = 36 + 1 = 37
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( 3×1+2) × 4 + 1 = 5 × 4 + 1 = 20 + 1 = 21
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3 × (1+2×4) + 1 = 3 × 9 + 1 = 27 + 1 = 28
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3 × (1 × 2 ) × ( 4 + 1 ) = 3 × 3 × 5 = 9 × 5 = 45