$$x ^ { 2 } - 7 x + 14 = 0$$

$$y^2+13y+30$$

$$4\int_0^3\left(x\right)\sqrt{9-x^{\left\{2\right\}}}dx$$

$$3\cot^2x-14\csc\left(x\right)-2=0$$

$$\frac{513.3}{9.40}$$

$$\left(x^4+3x^2y^2+y^4\right)dx-x^3ydy=0$$