$$1,728b^3+1,728y^3$$

$$x^2y'-x+1=0,y\left(1\right)=2$$

$$\sqrt[n]{7^{2n}}$$

$$\left(-9\right)\left(-11\right)\left(+1\right)$$

$$\int\frac{w^2+1}{w^2-w}dw$$

$$\frac{4s-9}{\left(s-1\right)\left(s-2\right)\left(s+3\right)}$$

$$\frac{dy}{dx}+\:y\:tanx=x\:sen2x$$