\frac{d}{dx}\left(\left(1+\cos\left(x^2\right)\right)\cdot e^x\right)
- e^x\left(1+\cos\left(x^2\right)+2x\sin\left(x^2\right)\right)
- e^x\left(-2\sin\left(x^2\right)+2x\cos\left(x^2\right)\right)
- e^x\left(1+\cos\left(x^2\right)-2x\cdot\sin\left(x^2\right)\right)
- e^x\left(-2x\sin\left(x^2\right)+\cos\left(x^2\right)\right)