You can put this solution on YOUR website!
(-8x7 + 5x9 - 1 + 3x8) - (7 + 7x8 + 7x9 + 2x7)
= ..Let us now remove the curved brackets. Keep one thing in your mind : if negative sign is found immediately before the bracket, then change all the signs inside the bracket. In the second bracket, we find -ve sign before the bracket starts. so we will change all the signs inside the bracket.
= Now arrange the terms degree-wise and simplify.
=
= Answer.
I hope this is clear to you. Feel free to contact me anytime for any doubts in maths. I am available atleast 18 hours online.