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Differentiate w.r.t. x
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\int \frac{x\left(5x-3\right)}{x}\mathrm{d}x
Factor the expressions that are not already factored in \frac{5x^{2}-3x}{x}.
\int 5x-3\mathrm{d}x
Cancel out x in both numerator and denominator.
\int 5x\mathrm{d}x+\int -3\mathrm{d}x
Integrate the sum term by term.
5\int x\mathrm{d}x+\int -3\mathrm{d}x
Factor out the constant in each of the terms.
\frac{5x^{2}}{2}+\int -3\mathrm{d}x
Since \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} for k\neq -1, replace \int x\mathrm{d}x with \frac{x^{2}}{2}. Multiply 5 times \frac{x^{2}}{2}.
\frac{5x^{2}}{2}-3x
Find the integral of -3 using the table of common integrals rule \int a\mathrm{d}x=ax.
\frac{5x^{2}}{2}-3x+С
If F\left(x\right) is an antiderivative of f\left(x\right), then the set of all antiderivatives of f\left(x\right) is given by F\left(x\right)+C. Therefore, add the constant of integration C\in \mathrm{R} to the result.