Mathematics
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    log(2,4)
    sin69
    139/2
     (114514+114514)*((114514+114514)*((114514+114514)*((114514+114514)*(-1+14*5-14)+(114514+(114*(51-4)+11*4*5-14)))+(11*4514+((1-14)*-514
    53423.2+42-21+12+24-42+121+65
    2.7÷0.72
    sqrt60
    -sinπ
    -sin(3π/2)
    -sin(π/2)
    -sinπ/2
    -sinπ
    6.25%×10%+93.75%×5%=
    √114514
    [(-√2)^-2]^1/2
    ((-15%-10.5%)^2×0.1+(10%-10.5%)^2×0.6+(20%-10.5%)^2×0.3)^0.5
    -15%×0.1+10%×0.6+20%×0.3
    15131669291+55
    15131669291+555
    15131669291+1+1

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