(0.78+2.243*(1.5^0.5))*(1-0.3)*((0.993+0.18*0.3)-1.06*0.09+1.71*(0.3^3))
    (0.78+2.243*(1.5^0.5))*(1-0.3)*((0.993+0.18*0.3)-1.06*0.09+1.71*(0.3^3))
    (0.78+2.243*(3^0.5))*(1-0.3)*((0.993+0.18*0.3)-1.06*0.09+1.71*(0.3^3))
    (0.78+2.243*(3^0.5))*(1-0.3)*((0.993+0.18*0.3)--1.06*0.09+1.71*(0.3^3))
    (0.78+2.243*(3^0.5))*(1-0.5)*(0.993+0.18*0.5)--1.06*0.25+1.71*(0.5^3)
    (0.78+2.243*(3^0.5))*(1-0.3)*(0.993+0.18*0.3)--1.06*0.09+1.71*(0.3^3)
    (0.78+2.243*(1.5^0.5))*(1-0.3)*(0.993+0.18*0.3)--1.06*0.09+1.71*(0.3^3)
    (0.78+2.243*(1.5^0.5))*(1-0.3)*(0.993+0.18*0.3)--1.06*0.09+1.71*(0.3^3)
    7/6【（7.5*1.2*1.2）+（7.5*1.2+16.5）*（1.2+1.5*1.2）+（16.5*1.5*1.2）】
    (4^4+64)*(12^4+64)*(20^4+64)/(8^4*64)/(16^4+64)/(24^4+64)
    (4^4+64)*(12^4+64)*(20^4+64)/(8^4*64)/(16^4+64)/(24^4+64)
    (4^4+64)*(12^4+64)*(20^4+64)/(8^4*64)*(16^4+64)*(24^4+64)
    （4^4）
    arctan(1/3)
    0.0001÷1.11252
    0.0001÷1.1125
    arctan(4/3)
    12-6 1/4-49/10=
    arctan(3.928/9.196)
    arctan(1/3)

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