$$\frac{d^2}{dx^2}\left(\sqrt{1-x^2}\right)$$

$$0.21\cdot3.005$$

$$\int\frac{x^3}{\left(4x+9\right)^{\frac{3}{2}}}dx$$

$$\int4e^{2x}\cdot sin\left(e^{2x}\right)dx$$

$$-2x^2+x+1$$

$$\left(5x^{3}-2x^{5}\right)^{2}$$

$$\lim_{x\to\infty}\left(x^{\frac{ln\left(x\right)}{1+ln\left(x\right)}}\right)$$