$$x\:\frac{dy}{dx\:}-2y=x\ln\left(3x\right)$$

$$\lim_{x\to0}\frac{\left(x-\sin\left(x\right)\right)}{\left(x.\sin\left(x\right)\right)^{\frac{3}{2}}}$$

$$2c+3c$$

$$\sqrt[4]{25a^2}$$

$$98\cdot98$$

$$\left(3s-4\right)b$$

$$6x^10-24x^3+3x-8$$