2/3*4/3*9/16+1/38*4*{7/2-[2/3+(1-8/9)-4/9]}+1/3
Come si fa?
http://www.wolframalpha.com/input?i=++2%2F3*4%2F3*9%2F16%2B1%2F38*4*%7B7%2F2-%5B2%2F3%2B%281-8%2F9%29-4%2F9%5D%7D%2B1%2F3
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