a) -3+5.(-2)= -3 * -10= 30
b) 6.(-5)+3.(-4)= -30 -12 = -42
c) (-2)8:(-2)5-(-7).(-2)=-8-14= -22
d) (-5):5-0⁴.189= -1
e) [3⁴:(-3)²+2*8:(-2)5*]= ( 3²+16 : -32= 9+1/2= 18/2+1/2=19/2=9,5
f) 48:[(-2).(+4)]:(-6)= 48: (-8): (-6)= 1
g) -4²+8.(-2)-(-1998)0= -16-16+1= -31
h) -13²+14²-196:(-7)= -169+196+28= 1
