$-\ \left(-\ 9\right)\ +5\ =$  

(a)  

 $\ +\left(-\ 1\right)\ +4\ =$  

(a)  

 $\ -\left(-\ 1\right)\ \cdot\ \left(-4\ \right)=$  

(a)  

 $\ -\ 9\ \cdot\ \left(-\ 5\ \right)=$  

(a)  

 $\ -9\ :\ \left(-\ 3\ \right)=$  

(a)  

 $\ -\left(+\ 5\right)\ +\left(-\ 6\ \right)=$  

(a)  

 $\ -\left(-\ 5\right)\ \cdot\left(-\ 6\ \right)=$  

(a)  

 $-\ 4\ -\left(-\ 8\ \right)=$  

(a)  

 $-\ \left(-\ 10\ \right)\ -\left(+\ 9\right)=$  

(a)