Mathematics
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    12cos3.16-72(cos2*3.16)(36(cos3.16)^2+325)^(-1/2)-(36(cos3.16)^2+325)^(-3/2)*2592(sin3.16)^2(cos3.16)^2
    12cos3.16-72cos2*3.16(36(cos3.16)^2+325)^(-1/2)-(36(cos3.16)^2+325)^(-3/2)*2592(sin3.16)^2(cos3.16)^2
    15÷10/21
    2.6/4
    400^4
    10^-8
    (ln(1416.24/262))^(-1)
    【2(√5-1)】÷(√5+1)
    2(√5-1)
    2/3*1*14.3*3.1415926*400^3*(sin(180*0.2288))^3/3.1415926+360*7959*332*(sin0.2288*180+sin0.7924*180)/3.1415926
    2/3*1*14.3*3.1415926*400^3*(sin(180*0.2436))^3/3.1415926
    1 2 3 4 5 6 7 9 0 1 2 3 4 5 6 7 9 × 8 1
    2/3*1*14.3*π*400^3*(sin(180*0.2436))^3/π
    (sin(0.2288π))^3
    (sin0.2288π)^3
    sin0.2288π
    2/3*1*14.3*3.1415926*400*400*400*(sin0.2288π)^3/3.1415926+360*7959*332*(sin0.2288π+sin0.7924π)/3.1415926
    atan[2-1/(2*√(3))]
    arctan(1.6/28)
    arctan4.2857

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