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[1/1 Formula]
    Work: Calculate the value of equation 45*45-(15+20*sqrt(2))^2 .
    Question type: Mathematical calculation
    Solution:
          45*45-(15+20*sqrt(2))^2
        =45*45-(15+20*sqrt2)^2
        =45*45-43.28428^2
        =45*45-1873.528895118400214
        =2025-1873.528895118400214
        =151.471105
    Answer:45*45-(15+20*sqrt(2))^2=151.471105

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