[√24-√(1/2）+2√(2/3)]-[√(1/8)+√6]
=√24-√(1/2）+2√(2/3)-√(1/8)-√6
=2√6-√2 /2+2√6/ 3-√2 /4-√6
=2√6-√6+2√6/ 3-(√2 /2+√2 /4)
=5√6/ 3-3√2 /4
√[-x^3/(x-1)²]
=x/(x-1)* √(-x)