Mathematics
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    2^3sin30
    2^3
    5+3
    cos120
    4.9x^2+340x-680=0
    t3-6t-4=0
    ln(50-49x)*(1/1-x)=5.301
    4.01 * e ( 81.56 / -113.61 ) - 4.11 * e ( 81.56 / -57.8 ) -0.33
    4.01e(81.56/-113.61)-4.11e(81.56/-57.8)=0.33
    2X^2+4X-3=0
    (10000+880a)×(1-5/18a%)=(2000+400a)×(1-3/10a%)+(8000+480a)×(1-1/4a%)
    200×(1+2a%)×100+50×(1+6a%)×160
    10*1.2*1.4*1.6*1.8*2.0*2.4
    10/0.6/0.6/0.6/0.6/0.6
    120*0.55*0.55*0.55*0.55
    120*0.65*0.65*0.65*0.65
    120*0.6*0.6*0.6*0.6*0.6*0.6
    x^5=2
    x^4/5=4√2
    x/1.13*0.13=299661

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