$$x^4+x+mx$$

$$\int\frac{\left(1\right)}{\left(6-5x\right)}dx$$

$$\frac{d}{dx}\frac{x+2}{x^2}$$

$$135-15$$

$$\int t^2\left(\sqrt{t^3-1}\right)dt$$

$$\left(4x^2\right)\cdot\left(2x\right)-\left(25\right)$$

$$\csc\left(x\right)=\sin\left(x\right)+cos^2\left(x\right)csc\left(x\right)$$