4. y = e³ˣ⁺¹ + 2x⁴

4. $$y = e^{3x+1} + 2x^4$$

$$y' = (e^{3x+1} + 2x^4)' = 3e^{3x+1} + 8x^3$$

Ответ: $$3e^{3x+1} + 8x^3$$