1. Solve for $x$: $$2x + 3 = 7$$ 2. Find the roots of the quadratic equation: $$x^2 - 5x + 6 = 0$$ 3. Simplify the expression: $$\frac{3x^2 - 12}{6x}$$ 4. Calculate the value of $y$ when $x=2$ in the function: $$y = 4x^2 - 3x + 1$$ 5. Factorize the polynomial: $$x^3 - 3x^2 + 4x - 12$$