e, \(\left(-9\right).\left(-3\right):\left(-27\right)\)
\(=27:\left(-27\right)\)
\(=-1\)
f, \(26-\left(-4\right)+7-20\)
\(=30+7-20\)
\(=37-20\)
\(=17\)
g, \(235+\left(-486\right)+\left(-135\right)+376\)
\(=-251+\left(-135\right)+376\)
\(=\left(-386\right)+376\)
\(=-10\)
h, \(125+\left[17+20+\left(-125\right)\right]\)
\(=125+\left[37+\left(-125\right)\right]\)
\(=125+\left(-88\right)\)
\(=37\)