1. Expand and simplify 2(3 + a) + 4(5 + a)
2. Expand and simplify 5(4 + s) − 3(2 − 2s)
3. Expand and simplify 11(y + 2) + 14(2y + 3)
4. Expand and simplify a(17b + 11) − 7b(2a + 4)
5. Expand and simplify 30(x + y) + 17(2x + 3y)
6. Expand and simplify x(3 + 20y) + 10y(4 − 2x)
7. Expand and simplify 4(7a + 10b) − 6(8a − 2b)
8. Expand and simplify 2(9x + 16y) − 4(2x − 8y)
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