已知 $f\left(x\right)=m(x-2m)(x+m+3)$， $g\left(x\right)=2^x-2$，若同时满足条件：
① $\forall x\in R,f\left(x\right)<0$或 $g\left(x\right)<0$，② $\exists x\in (-\infty ,-4),f\left(x\right)g\left(x\right)<0$

则 $m$的取值范围是.