(2−53+76−910+1115−1321+1528−1736+1945)⋅56
=[2−(53−76+1736)−910+(1115+1945)−1321+1528)]⋅56
=[2−(6036−4236+1736)−910+(3315+1915)−1321+1528]⋅56
=[2−3536−910+5215−1321+1528]⋅56
=[2−3536−910+265−1321+1528]⋅56
=[2−3536−(1321+1528)+(265−910)]⋅56
=[2−3536−(5284+4584)+(5210−910)]⋅56
=[2−3536−9784+4310]⋅56
=[3736−9784+4310]⋅56
=[1+136−1−1384+4+310]⋅56
=[4+136−1384+310]⋅56
=[3+136+7184+310]⋅56
=[3+351260+10651260+3781260]⋅56
=[3+14781260]⋅56
=[3+739630]⋅56
=2629630⋅56
=2629756