25/23=
    23/25=
    14/15=
    45*0.8=
    32/56=
    24/56=
    240/32=
    32/24=
    24/34=
    32/24=
    5/7=
    tanarccos0.67-tanarccos0.92
    26973588408.60/34059175850.30
    2391641182.47/34059175850.30
    arcsin0.08923
    1000*0.9^30
    100*(0.9^30)
    100*(0.5^30)
    100*0.5^30
    30×50×(1+6%)×(1+4.5%)×(1+7%)×(1+3.41%)+12×480×(1+7%)×(1+3.41%)+(40×2×30+2×900×60%)×(1+7%)×(1+3.41%)(12×3×30+3×600)×(1+7%)×(1+3.41%)+(50×30+10×700)×(1+7%)×(1+3.41%)=

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