1) A= (3a² -6a)(0.0625 -2) - 1,5a^6 +5a² +a² - 12 =
= -1,9375·(3a² -6a)- 1,5a^6 +6a² - 12 = 1,1875 + 11,625a - 1,5a^6 -12
2) B=2x^7 -x³y³ - 2^4y²+y^5 - 2x^7 +2x²y^4 +x^5y³ - y^7=
= -x³y³ - 2x^4y²+y^5 +2x²y^4 +x^5y³ - y^7
3) C= 2b^8 +3b³c² -0,8b^5c^4 -1,2c^6 +1,2c^6+6b²c^5 -0,4b^6c - 2b^8 =
= 3b³c² -0,8b^5c^4+6b²c^5 -0,4b^6c
4) D = 3a²b -6a²c²+15a² -15a²b+20+6a²c²+12c -4b³ -12c=
= 15a² -12a²b -4b³ +20