0.5的十次方*2的十次方+(-5的0次方3)+3除以3的平方
=(0.5*2)^10+1/3+1/9
=1+1/3+1/9
=13/9
(-3a的三次方)的平方*a的三次方+(-4a)的平方*a的七次方+(-5a的三次方)的三次方
=9a^6*a^3+16a^2*a^7-125a^9
=9a^9+16a^9-125a^9
=-100a^9
(3)(x+3)的平方-(x-1)(x-2)
=x^2+6x+9-(x^2-3x+2)
=x^2+6x+9-x^2+3x-2
=9x+7
(4)(a-2b+c)(a+2b+c)
=[(a+c)-2b][(a+c)+2b]
=(a+c)^2-4b^2
=a^2+2ac+c^2-4b^2