Why do integrals always have a dx?

How to integrate 1dx

I Computed An Integral That Breaks Math

What is dx? This is Why Integrals Always have 'dx'.

Q1 | ∫ dx | Integration of dx | Integral of dx | Indefinite Integral | Calculus | Gravity Coaching

Why dx After an Integral Sign?

Integration and the fundamental theorem of calculus | Chapter 8, Essence of calculus

Integration (Calculus)

Integral of dx/sqrt x^2 -a^2

integral de dx

Integral of 1/(1+e^x)

Int{dx/sqrt(x(1-x)) dx} from 0 to 1

How to integrate 1/x^2

Integral of 1/(x-1) (substitution)

Integral of 1/(1+x^2)

INTEGRAL OF THE FORM: ∫ dx/(a+b Cosx)

integrate dx/x^2

Find the integral of dx/(4+9x^2)

Integral of 1/(1 + cos x) dx

Integral of xe^x