Salutare!
a)
a = 2
b = 4
c = 6
[tex]\bf a-(b-c) = 2-(4-6)=2-(-2) = 2+2 =\boxed{\bf 4}[/tex]
b)
a = -12
b = -14
c = -8
[tex]\bf a-(b-c)= -12-[-14-(-8)]=-12-(-14+8) =-12-(-6)=-12+6=[/tex]
[tex]\bf a-(b-c)= \boxed{\bf -6}[/tex]
c)
a = -6
b = -3
c = -15
[tex]\bf a-(b-c)= -6-[-3-(-15)]=-6-(-3+15) =-6-(+12)=-6-12=[/tex]
[tex]\bf a-(b-c)= \boxed{\bf -18}[/tex]
