Mathematics
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    3.4=((2×10×sin(x+20)×sin(x-20))÷(19×(1-cos(x-20)))
    sqrt6.25
    2^2+(3/2)^2
    2+3/2
    x^3-2x+1=0
    50087.4*0.5
    13556.4+36531
    13556.4+2252.8+2764.8+381680+36531
    42280-30701.5
    30701.5-42280
    57183-26481.5
    480000*0.0275+2200+2700+3256.93*12
    392397.48+39083
    379128*1.035
    379128*0.02
    379128*1.02
    39083+379128+13269
    384000*0.04*(1-0.0275)
    480000*0.2
    480000-384000*(1-0.04)

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