(1)原式=(97+94)*(97-94)+(91+88)*(91-88)+(85+82)*(85-82)=191*3+179*3+167*3=537*3=1611
(2)原式=n(n+1)(2n+1)/6=10*11*21/6=385
(3)原式=1*(1+1)+2*(2+1)+...+19*(19+1)=(1^2+2^2+...+19^2)+(1+2+3+...+19)=2660
(4)原式=(0.1^3+0.9^3)+(0.2^3+0.8^3)+...+(0.4^3+0.6^3)+0.5^3+1=(0.1^2-0.1*0.9+0.9^2)+(0.2^2-0.2*0.8+0.8^2)+...+(0.4^2-0.4*0.6+0.6*2)+2.25=(0.1+0.9)^2+(0.2+0.8)^2+...+(0.4+0.6)^2-3*(0.1*0.9+0.2*0.8+...+0.4*0.6)+2.25=4.15