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calculati {-3x[7x(15-10-2)-3 x(-8) +5] +20-4}x(+2)

Răspuns :

{- 3 * [7 * 3 - 3 * (- 8) + 5] + 16} * 2 =
{- 3 * [21 + 24 + 5] + 16} * 2 =
{- 3 * 50 + 16} * 2 =
{ - 150 + 16} * 2 =
- 134 * 2 =
- 268