(48.8×10^3-0.3×246.8×10^3)/(1×0.58×300)+(85.4×10^6-0.4×246.8×10^3×0.2)/(1.3×1×1×300×340)
    0.4×246.8×0.2
    0.14×360/1.96×25
    (85.4×10^6-0.4×246.8×10^3×0.34)/(0.4×0.9×1×300×340)
    (48.8×10^3-0.3×246.8×10^3)/(0.9×0.58×300)+(85.4×10^6-0.4×246.8×10^3×0.34)/(1.3×0.9×1×300×340)
    0.6+0.25×10/25
    (4.0-0.08×25) √(25.3/300)
    (796.7×10^6×610.1)/(36.47×10^8 )
    √(〖61.9〗^2+3×〖53.5〗^2 )
    (1472.5×10^3×8621340)/(7916746372×30)
    (1472.5×10^3×11335759.2)/(7916746372×30)
    (796.7×10^6)/23932123.2
    (796.7×10^6)/12868573.4
    7916746372/(946-330.8-30)
    7916746372/330.8
    7916746372/(946-330.8)
    910×30×(330.8-15)
    910×30×(330.8-15)+2×30×(330.8-30)×(330.8-30)/2
    〖(90.1/347.2)〗^2+〖(176.8/560)〗^2
    (796.7×0.48)/(〖0.48〗^2×8+〖0.2〗^2×8)

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