k: \(=\dfrac{88-33+60}{132}:\dfrac{55+132-84}{132}\)
\(=\dfrac{115}{55+132-84}=\dfrac{115}{103}\)
l: \(=\dfrac{-1}{9}+\dfrac{1}{9}+\dfrac{1}{4}-\dfrac{1}{4}=0\)
m: \(=21.7-3.45+2.5\cdot10+25=18,25+25+25=68,25\)
n: =2,1-[4+3,2+4,8]*10
=2,1-10*12
=2,1-120
=-117,9