(-0.04+0.06+(-0.07)+0.12+(-0.02)+0.05)÷6
    1+√0/(1+0)
    1+√3/(1+3)
    1+√2/(1+2)
    1+√1/(1+1)
    1+√1/1+1
    arccos0.93
    arccos3469/3700
    A(1,2,3) C(2,4,6)
    9.8*1.02+0.102+10.2*0.01
    sin1/2
    sin2/1
    arctan(1.53)
    （9.3*3.4+3.4*10.7）/0.17
    9.8*1.02+0.102+10.2*0.01
    40/3÷4
    4.9-3.5 7.6-6.5 41.4-36.7 9-5.7 5.11-3.6 2.88+6.12 25×6 125×8 26×4 100÷4 300÷75 1000÷125
    132.6/1.2
    70.39×1.2
    105.08×0.692-2×1.4×√0.692

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