Mathematics
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    16+49
    arccos(0.906125)
    arccos(0.872571428571428571)
    arccos(0.87257142)
    6+8*5
    log-510
    e^((-3.14/3)/sqrt(1-1/9))
    4:2=
    12-(-3)×{1/4/[-1/2]²}
    12-(-3)×{1/4+[-1/2]²}
    e^(3-2)
    90+arctan(66.6*1.2)-arctan(888*1.2)-arctan(0.5*1.2)
    90+arctan(66.6*1.4)-arctan(888*1.4)-arctan(0.5*1.4)
    √((106.2/1.22)^2+〖42.3〗^2 )
    (391.1×10^3)/(4×7×330)
    (97.8×10^6)/920887.4
    (97.8×10^6)/1593048.5
    (391.1×10^3×(-600))/(317419696×2×20)
    (391.1×10^3×1173585.8)/(317419696×2×20)
    (97.8×10^6)/(1.05×1310027.6)

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