$$0-5\:+\:650$$

$$x^2-2x+1=16$$

$$x^2-3x+25$$

$$\left(x^2y+y^2\right)dx+xydy=0$$

$$2x^3y-5x$$

$$\int\left(\frac{\sqrt{4+\sqrt{x+1}}}{\sqrt{x+1}}\right)dx$$

$$\tan\left(x\right)\frac{\csc^2\left(x\right)}{\sec\left(x\right)}$$