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=(-3)^-1*(-2)^2=-1/3*4=-4/3
b. (-1,6)^3:0,04^3*10^-3 = (-1,6:0,04)^3*10^-3=(-40)^3 *(1/10)^3=(-40/10)^3=(-4)^3=-64
c (0,25)^2/ 0,001^3 :0,5/0,01^5= (0,5)^4/(10^-3)^3:0,5/(10^-2)^5=(0,5)^4/10^-9:0,5/10^-10=
=(0,5)^4/10^-9 * 10^-10/0,5= (0,5)^4-1 *10^-10+9 =(0,5)^3*10^-1=0,125*0,1=0,0125
d 4^3 *36 ^2 / 4^4 *2*3^4 - 2^7 *3^4/6^5 =4^4*(9*4)^2/4^4*2*3^4 -2^7*3^4/(2*3)^5=
=4^4*9^2*4^2/4^4*3*3^4 -2^7*3^4/2^5*3^5=4^4*3^4*4^2/4^4*3*3^4 -2^7*3^4/2^5*3^5=
=4^2/3 -2^7-5*3^4-5=4^2/3 -2^2*3^-1=16/3-4/3=12/3=4