【(x的平方+5x+6)/(x+3)/(x平方-4)/(x-3)】-1
=【(x+2)(x+3)/(x+3)/(x平方-4)/(x-3)】-1
=【(x+2)/(x+2)(x-2)/(x-3)】-1
=【1/(x-2)(x-3)】-1
=【1/(√3-2)(√3-3)】-1
=【(√3+2)/(√3+2)(√3-2)(√3-3)】-1
=【(√3+2)/(3-4)(√3-3)】-1
=【(√3+2)/(3-√3)】-1
=【(√3+2)(3+√3)/(3+√3)(3-√3)】-1
=【(5√3+9)/6】-1
=(5√3+3)/6