pls help me with steps {63÷ (2x3) - 40÷ 8 x (21÷3)} ÷ 2
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(63/6-40/8x21/3)/2
(21/2-5x7)/2
(21-70)/4
-49/4
(21/2-5x7)/2
(21-70)/4
-49/4
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