Calcule a integral $\int\left(8x^4-x^3\right)\cos\left(4x\right)dx$

 Gráfico de funções

Gráfico de: $2x^4\sin\left(4x\right)-\frac{1}{4}x^3\sin\left(4x\right)+2x^{3}\cos\left(4x\right)-\frac{3}{16}x^{2}\cos\left(4x\right)+\left(-\frac{3}{2}\right)x^{2}\sin\left(4x\right)+\frac{3}{32}x\sin\left(4x\right)-\frac{3}{4}x\cos\left(4x\right)+\frac{3}{128}\cos\left(4x\right)+\frac{3}{16}\sin\left(4x\right)+C_0$