-10(2a+5)+3(4-6а)
-20×9-50+12-6×9=-272
10(2a+5)+3(4-6а)
20×9+50+12-54=188
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-10(2a+5)+3(4-6а)
-20×9-50+12-6×9=-272
10(2a+5)+3(4-6а)
20×9+50+12-54=188