【評論主題】【題組】7. With more than forty years’ hard work of government and people, Taiwan has turned itself from

【評論內容】

ml = PLUS(m1+m2, m1-m2)*MINUS(m2-m1, m2+m1);    = PLUS(a,b)*MINUS(c,d); // a -- m1+m2, b -- m1-m2, c -- m2-m1, d -- m2+m1    = a-b*c+d;    = m1+m2-b*c+d;    = m1+m2-m1-m2*c+d;    = m1+m2-m1-m2*m2-m1+d;    = m1+m2-m1-m2*m2-m1+m2+m1; // m1=5, m2=3    = 5+3-5-3*3-5+3+5    = -3 

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