$$\int e^{\frac{-1}{4}x}\cdot\cos\left(\frac{\sqrt[2]{15}}{2}x\right)dx$$

$$2x+3=-3$$

$$\frac{dy}{dx}=x^4+\left(\frac{y}{x}\right)$$

$$\left(3a^2+2b^3\right)^3$$

$$3\:x\:+18$$

$$5+8.6$$

$$8x\cdot\sin\left(\frac{3}{\sqrt{x}}-4x\right)$$