$$xy+3y\:cuando\:x=\:2,\:\:y=\:4$$

$$\int\frac{\left(x^3+x-1\right)}{\left(x^2+2\right)^3}dx$$

$$\sqrt{16\cdot10^{-6}}$$

$$lnx+ln\left(3x\right)=1$$

$$2ax+6ay-4az$$

$$y=1x^2+3x+2$$