4а^-12а+9+а^2+16 = 5а<span>^2 - 12а + 25</span>
-40*(1/2)^4=-40*1/16=-2,5
3√3 - 3√27 + 2√243 = 3<span>√3 - 9√3 + 18√3 = 12√3</span>
2c^4*(-5c)-c^5=-10c^5-c^5=-11c^5
55^3 - 3*55^2*52 + 3*55*52^2 - 52^3 = (55-52)^3 = 3^3 = 27
(82^2 - 18^2)/(51^2 - 49^2) = ((82-18)(82+18))/((51 - 49)(51+49)) = (64 * 100)/(2*100) = 32