$\text{a)}55+\left(55-7\right)+\left(55:5\right)=55+48+11=114$

$\text{b)}55+\left(55-7\right)+\left(\left(55-7\right)-6\right)=55+48+42=145$

$\text{c)}55+\left(55-7\right)+\left(\left(55-7\right):3\right)=55+48+16=119$

$\text{d)}55+\left(55-7\right)+\left(2\cdot 55\right)=55+48+110=213$