hi there, can you take a look at my work and tell me what did i do wrong?

*ns 1 1 - X ne c 1) Tone The drivitive = (1 -X )2 2 ) Replace wild - X2 3 ) Simpling 2 Ginx 20 = (9 ) SupliFY ( x x2 ) 10 Both side [Gunx 2" = 7 X and SPIN x 4 1 ) 5 ) Simplify x +1 ( x 2 # 1 ) 2 = -> " - ) TO Brill sides ( x 2 +1 7 2 X41 6 ) InTigrole Bone Sides nx 2nt ! ( - 1 ) ? X 2 2 ( x 2 + 1) * 2 + 12071 C- 1)~ 2 ) 2 ( X #1 ) - arcrantx ) " - acctances + 2 ( x 7 1 ) ALL 2n+ 1 nx 2at1 X 2 1 1 CICI LE x 41 du/ dx = 2x an x ntt - 1 ) ? = - arcan (x ) + = [ Su 2n41 5 2 In ( x 2 + 1 ) - arslan ( x ) 2 Ast 2atl 1 21 2 In ( 9 + 7 ) - arctan ( ! ) 00Question 3. Evaluate 2n 1 2n+1 _1 TI _ . El ) 2n+1 (2) Hint 1: Start with I]: = 21:0 :17\