[1-2×(2.1/4.5)2+(2.1/4.5)3]
    144/1.2
    9887640449438202247191×88
    112359550561797752808*88
    ln0.358112716
    ln5776/ln16129
    ln5776/16129
    arctan2.75
    11*45*1*4-11+45-14
    √(〖96.5〗^2+3×〖44.3〗^2 )
    (1926×1000×6461411)/(4678087500×2×30)
    arctan(0.4)
    arctan(2.5)
    （5.978-5.978/1.13*0.13+0.05）/7.24
    （6.978-6.978/1.13*0.13+0.05）/7.24
    （5.078-5.078/1.13*0.13+0.05）/7.24
    1/2×1.25×〖38.90〗^2×0.9×0.05
    1/2×1.25×〖38.90〗^2×2.05×0.1
    ((4×276.4×10^3)/(π×210^2 )×230×130)/((130+100-20)×10)
    √((70.51/1.22)^2+〖73.12〗^2 )

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