Mathematics
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    1447*1.15(1+(5*100/(1200+100)))
    1447*1.15(1+(5*10/(1200+10)))
    1447*1.15(1+(5*1/(1200+1)))
    3*2^0.5/2
    arcsin(2/3)
    arcsin(10/15)
    (17^2-8^2)^0.5
    71*12.19/7.93=
    70.85*12.19/7.93=
    70.85*12.1/7.93=
    70.85*12.19/7.988=
    70.85*12.19/8=
    70.85*12.19/7.96=
    sin20*sin40*sqrt3/4
    sin20*sin40
    18%*0.6+13%*0.6
    15%*10*16.67%/(1-15%*10*16.67%)
    [3/7+0.5*(-2/3)]*(-21/5)
    2.75-[-0.5+(5/6)-(0.125-14/3)]
    -3^3/(12/5)-(-2)^2*4

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