Mathematics
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    250000(1+0.05)^10=
    250000(1+5)^10=
    250000(1+0.05)10=
    25000(1+0.05)^10=
    25000(1+5)^10=
    100000/(1+5%)^5
    cos60
    cos120
    -18000+10500/(1+15%)+7000/(1+15%)^2+6000/(1+15%)^3
    -15000+9500/(1+15%)+6000/(1+15%)^2+2400/(1+15%)^3
    1/2×5×8/3
    2000*((1.019427^20-1)/0.019427)
    2000*((1-1.019427^(-20))/0.019427)
    8×[6÷(3-1)+4×(2+3)]
    6×(2+3)-4÷(4-2)
    (-1/64400)*(146*3.47*3.47*3.47/6-42.88*3.47*3.47*3.47*3.47/24-579.51*3.47)
    (-1/644000)*(146*3.47*3.47*3.47/6-42.88*3.47*3.47*3.47*3.47/24-579.51*3.47)
    (-1/64.4)*(146*7*7*7/6-42.88*7*7*7*7/24-579.51*7)
    7÷0.28= 104÷0.52= 89.1÷0.27= 1÷0.025= 21÷1.4= 88.4÷0.52= 135÷4.5= 2124÷0.36= 1197÷1.5= 696÷2.9= 384÷0.8= 357÷4.2=
    7÷0.28= 104÷0.52= 8.91÷0.27= 1÷0.025= 21÷1.4= 88.4÷5.2= 135÷4.5= 2124÷0.36= 1197÷1.5= 696÷2.9= 384÷0.8= 357÷4.2=

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