$-6\text{•}\left(\square 7\right)=-42$

$\square 4\text{•}(-8)=32$

$\square 9\text{•}5=-45$

$3\text{•}\left(\square 7\right)=21$

$72:\left(\square 8\right)$ = -9

$-36:(-6)=\square 6$

$\square 25:5=-5$

$\square 56:(-8)=7$