符号计算出现了意想不到的结果

syms A B C D;
syms V W m a q u;
syms p;
syms E;
solve((A*V+(1/2)*B*m*pi*B*W/a-C*W-(1/2)*D*m*pi*B*V/a+2*q*a^4*(1-cos(m*pi))/(pi^5*E*m^5))*p,(A*m^2*pi^2*V/a^2+2*B*m^2*pi^2*V/a^2+(1/2)*B*m^3*pi^3*B*W/a^3-C*m^2*pi^2*W/a^2-2*D*m^2*pi^2*W/a^2-(1/2)*D*m^3*pi^3*B*V/a^3)*p,(A*m^2*pi^2*V/a^2+2*B*m^2*pi^2*V/a^2+(1/2)*B*m^3*pi^3*B*W/a^3+C*m^2*pi^2*W/a^2+2*D*m^2*pi^2*W/a^2+(1/2)*D*m^3*pi^3*B*V/a^3)*p-(A*V+(1/2)*B*m*pi*B*W/a+C*W+(1/2)*D*m*pi*B*V/a+2*q*a^4*(1-cos(m*pi))/(pi^5*E*m^5))*m^2*pi^2*p*u/a^2,(A*m^3*pi^3*W/a^3+3*B*m^3*pi^3*W/a^3+(1/2)*B*m^4*pi^4*B*V/a^4+C*m^3*pi^3*V/a^3+3*D*m^3*pi^3*V/a^3+(1/2)*D*m^4*pi^4*B*W/a^4)*p-(A*m*pi*W/a+B*m*pi*W/a+(1/2)*B*m^2*pi^2*B*V/a^2+C*m*pi*V/a+D*m*pi*V/a+(1/2)*D*m^2*pi^2*B*W/a^2)*m^2*pi^2*p*(2-u)/a^2,A,B,C,D)
ans =
    A: [3x1 sym]
    B: [3x1 sym]
    C: [3x1 sym]
    D: [3x1 sym]

1. Result = ans;
   
2. Result.A
   
3. Result.B
   
4. Result.C
   
5. Result.D

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