a) [9²+9×5²-3×2³+7)]÷3²=

b) 10²×[(2²+2³)÷12+3³÷3]=

c) [7²³×(1+7⁰+5³÷25)]÷7²²=

d)[2⁰+2¹+3¹⁴÷(3×3¹²)]²÷3²

vă rog frumos ajutatima...​