Activity 2: Given the following algebraic expressions, determine whether each of the following are monomial, binomial, trinomial or multinomial. Kindly refer to the definitions above.
1. 3x3
2. 4x + 1
3. 3x2 + x – 5
4. 3(x – 5y) + 6
5. 5x2 + 3x2y – 8y + 3