We can integrate each term separately using the power rule for integration. The power rule states that:
∫xndx=n+1xn+1+C, where n=−1. First, consider the term 5x4. Using the power rule, we get ∫5x4dx=5∫x4dx=5⋅4+1x4+1+C1=5⋅5x5+C1=x5+C1. Next, consider the term −3x2. Using the power rule, we get ∫−3x2dx=−3∫x2dx=−3⋅2+1x2+1+C2=−3⋅3x3+C2=−x3+C2. Finally, consider the term 23x. We can rewrite x as x1/2. Then we have ∫23xdx=23∫x1/2dx=23⋅(1/2)+1x(1/2)+1+C3=23⋅3/2x3/2+C3=23⋅32x3/2+C3=x3/2+C3. Adding all the integrated terms together, we have
∫(5x4−3x2+23x)dx=x5−x3+x3/2+C, where C=C1+C2+C3.