Integration is the process of giving numbers to the various functions it is commonly used in calculus. The assigning numbers will define displacement, volume, and area. Integral is a given function in derivatives which is further produced a function that is used for differentiation and calculating the area lies under the curve of a graph in a function. Integration is an important step that is specific in finding central points, areas, volumes, etc.
How to calculate integral?
Integral is calculated using a formula. It involved multiple steps. For example, we can find the function by dividing the area into small pieces and then add the width of these slices by Δx. But the addition of all dividing slices will mess the graph and won’t define function properly. 

Despite if we have decreased the width of differentiated x i.e. (Δx) and then add up all the divided areas then the accuracy will become better. We can achieve the maximum accuracy by decreasing the width of all slices up to zero. It will give us the definite result.
How does an integral represent?
Integral is represented by symbols “S” and “s” in the sum of the parts to find the area under the curve.
                                                              ∫2xdx
The above formula is used to find integral. Where ∫is the symbol of integral 2x is the function which we want to integrate and dx indicates the direction along the x-axis. It is dependent on the plane.

If there is a y plane then dx will be replaced by dy. dx is used to indicate that area slices are in the direction of the x-axis, and the width is approaching zero. We can write a complete equation like this
                                                              ∫2x+1dx

The two important entities of integral “definite integral” and “double integral”
Integral is a function which is a summation. There is a need to find the net area between function and x-axis. The theme of a definite integral is closely related to the notation used for indefinite integral. There are two limits of integral. I.e Upper limit and lower limit.

The lower limit is indicated by the value of “a” which is present at the bottom of the integral sign. And the “upper limit” is assigned to the value of b which is present at top. Multiple integrals show more than one real variable.

Double integral is a little bit more complex than others. For understanding the property of double integral, let’s consider an example.
Considering a function f (a, b) present in a 3D space in the XY plane. And R presents in any region in AB or XY plane. If we divide the R into smaller parts than the double integral in r region will be:
ʃʃR ƒ (a, b) dadb=limn ͢ 0 Σ (n, i=1) ƒ (ai, bi) δai δbi
Integration is a basic but complex function. Its complexity increases as we move on different variable integrals. The complexity of integration can be simplified by using an integration calculator. It will not only save you from the hustle of remembering long equations but derive accurate results too. And you can save time and solve such tricky questions very easily.
What is a derivative?
The derivative of a function has a specific entity in mathematics. The process by which a derivative is solved is called differentiation.
When a function changes at a specific rate at some point it is called derivation or derivation of a function. The rate of change can be predicted by calculating the ratio of change of Y against the independent variable X.
The ratio of change in a derivative is considered the limit as X approaches zero. i.e. Δx0
Leibniz’s notation
It is a specific type of representing the derivative of a function. According to this the derivative of “a” is represented as:
Function y = f(x) as af / dx or dy / dx.
The derivative of a function can be found by following these steps.

  • Delta is the differentiation quotient hence Δy/Δx = f(x0+Δx) −f(x0) / Δx
  • The quotient can be simplified by canceling Δx. (cancel if possible).
  • After finding the differentiation off (x0), apply the limit to the quotient. The function would be differentiated at xo only if the limit exists. 

These steps are used to find the derivative. But if you are confused between these terms you can use a leibniz notation calculator and solve the differentiation very easily.