d: =-5+9=4

c, = 13 . 29 = 377

d, = 40 : ( -10 ) + 9

= -4 + 9 = 5

a: (-145)-(18-145)

=-145-18+145

=-18

b: 111+(-11+27)

=111-11+27

=100+27

=127

c: (27+514)-(486-73)

=27+514-486+73

=100+500+14-486

=100+14+14

=128

d: 10-[12-(9-1)]

=10-[12-8]

=10-4

=6

e: (38-29+43)-(43+38)

=38-29+43-43-38

=-29

f: 271-[(-43)+271-(-17)]

=271-[-43+271+17]

=271-(271-26)

=271-271+26

=26

mình làm vài câu cho bạn tham khảo,các câu còn lại thì bạn làm tương tự thôi

23.\(\sqrt{14-2\sqrt{33}}=\sqrt{\left(\sqrt{11}\right)^2-2.\sqrt{11}.\sqrt{3}+\left(\sqrt{3}\right)^2}\)

\(=\sqrt{\left(\sqrt{11}-\sqrt{3}\right)^2}=\left|\sqrt{11}-\sqrt{3}\right|=\sqrt{11}-\sqrt{3}\)

28. \(\sqrt{25-4\sqrt{6}}=\sqrt{\left(2\sqrt{6}\right)^2-2.2\sqrt{6}.1+1^2}=\sqrt{\left(2\sqrt{6}-1\right)^2}\)

\(=\left|2\sqrt{6}-1\right|=2\sqrt{6}-1\)

29.\(\sqrt{14-8\sqrt{3}}=\sqrt{14-2\sqrt{48}}=\sqrt{\left(\sqrt{8}\right)^2-2\sqrt{6}.\sqrt{8}+\left(\sqrt{6}\right)^2}\)

\(=\sqrt{\left(\sqrt{8}-\sqrt{6}\right)^2}=\left|\sqrt{8}-\sqrt{6}\right|=\sqrt{8}-\sqrt{6}\)

nhìn rối mắt quá bạn ơi

mình ko bt làm

10/29+11/29+12/29+...+19/29

=10+11+12+13+14+15+=16+17+18+19/29

=145/29

a) x-(12-25)=-8

<=> x+13=-8

<=> x=-21

b) (x-29)-(17-38)=-9

<=> x-29+21=-9

<=> x-8=-9

<=> x=-1

a, x-(-13)=-8

<=> x+13=-8 

<=> x=-8-13

<=>x=-21

Vậy x=-21

b, (x-29)-(17-38)=-9

<=> x-29-(-19)=-9

<=>x-29+19=-9

<=>x-10=-9

<=>x=-9+10

<=> x=1

vậy x=1