$$x^2+12x+35=0$$

$$\frac{12+r-r^2}{r^3+3r^3}$$

$$\left(m-3\right)\:\left(m+3\right)$$

$$\frac{\left(a^{\frac{6}{9}}\right)\left(a^{\frac{2}{6}}\right)\left(a^{\frac{6}{6}}\right)}{\left(a^{-8}\right)}$$

$$y\left(t\right)=ce^{at}-\frac{b}{a}$$

$$y'=\left(x+y-7\right)^2$$

$$\left(\sqrt{x+by}\left(\sqrt{x}\right)\right)$$