(10x1950[7000-{1950x2}])x5.4%
(10x1950[7000-{1950x2}])x0.6%
(10x1950[7000-{1950x2}])x5.4%=326430000%
(10x1950[7000-{1950x2}])x0.6%=36270000%
Successively calculate the curly bracket, the square bracket, the round bracket.
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