$$\frac{dy}{dx}=\frac{5x}{4y\sqrt{\left(x^2+1\right)}}$$

$$\left(x+2\right)+\left(3x+4x\right)$$

$$\lim_{x\to\infty}\left(\frac{x+3}{\sqrt{x^2+4}}\right)$$

$$\left(-21\right)+15-\left(-12\right)$$

$$\int_0^{3m}\left(f\right)dx$$

$$t^2-17t-72$$

$$\left(6a+8\right)\left(6a+8\right)$$