\( y = x^2 \) \( \sqrt{x+5} \) \( a^2 + b^2 = c^2 \) \( \int f(x) dx \) \( y = mx + b \) \( \frac{d}{dx} x^3 = 3x^2 \) \( \sum_{i=1}^n i = \frac{n(n+1)}{2} \) \( \sqrt{a} \) \( \pi \approx 3.14 \) \( x^2 + y^2 = r^2 \) \( \int_0^1 x^2 dx \)