1) =14*(-1/7)^2=14*1/49=14/49=2/7
2) = 16-(-2)^4=16-16=0
3) =(18*1/6)^4=3^4=81
4) = x^2(x-1)=0.1^2(0.1-1)=0.01-0.9=-0.89
5) = (-0.8+0.6)^5=(-0.2)^5=-0.00032
6) = (1 1/3)^3*(-1 1/2)^2=64/27*9/4=16/3=5 1/3
7-2(x-4.5)=6-4x
7-2x+9=6-4x
16-2x-6+4x=0
10+2x=0
2x=10
x=5
Решила все, кроме части С