Question

9power 10 +9power9-9power8 (9square+9)

Answer 1

this question is wrong pls check this question

Answer 2

9^10 + 9^9 -9^8 (9^2 + 9) 
= 9^10+9^9-9^8 (9^2 +9^1)
= 9^10+9^9-9^8*90 
= 3486784401 +  387420489 - 3874204890
=0