Why do integrals always have a dx?

Reduction formula for integral x^n sin mx dx and integral cos^mx sin nx dx

Recursive Formula Derivation For The Integral 1/(x^2+a^2)^n

226. Integral de dx entre x^2 + 9, aplicando fórmula

power reduction formula for the integral of sin^n(x)

power reduction formula for the integral of sec^n(x)

dy/dx, d/dx, and dy/dt - Derivative Notations in Calculus

JNTU/OSMANIA/ENG MATH-|| / B.SC/M.SC ||PROBLEMS ON HOMOGENEOUS DIFFERENTIAL EQUATIONS| part 11

Indefinite Integral - Basic Integration Rules, Problems, Formulas, Trig Functions, Calculus

Reduction Formula for Integral of ∫cos^n(x)dx

question and solution , using reduction formula for , integral tan^n x dx .

Derive a power reduction formula for integrating (x^2+a^2)^n dx

Reduction Formula for Integral of ∫sin^n(x)dx

Integral of sec^n(x)dx reduction formula derivation with integration by parts.

Proof formula Integral f(x)dx from 0 to a

Integral of 1/(1 + cos x) dx

find reduction formula for integral sin^nx dx and find integral of sin^4x dx

Integral of sin^n(x)dx Reduction Formula Proof

Deriving the reduction formula for Cos^nxdx

dy/dx னா இவ்வளவு தானா? | Basics of Calculus | LMES