Ok MG.
It is really good to work in advance but it is even more important to make sure you understand and can do all the work you have already covered. This basic work is the building blocks that you will need for always.
The more thoroughly you understand them the easier future work will be and the further you will be able to go with mathematics in your future :)
Use forum questions - like you have been - to not only discover new and exciting mathematics but also to practice all the basic maths that you already have.
I still have not homed in properly on your level.
Here are a few questions. I want to work out what you do and do not understand.
You can copy my questions and then put the answers with the questions.
Don't get help, I want to see what you can do by yourself :)
$$\\1) 3x-2x^2 - 8xy+3yx-7\\
2) 5x*6xy\\
3) 3(x+4)\\
4) -2(x+4)\\
5) 17-4x-x+5\\
6) 3-4(5x-6)\\
7) \frac{3x}{2}+\frac{4x}{5} \qquad $(Make an entire fraction)$\\
8) 0.06*0.3 \qquad $ (No calculator)$\\
9) 0.06\div 0.2 \qquad $ (No calculator)$\\
10) 3x^2+2x+5\\
11) \frac{5x+2}{6y}\times 9xy^2$$
\\1) 3x-2x^2 - 8xy+3yx-7\\ 2) 5x*6xy\\ 3) 3(x+4)\\ 4) -2(x+4)\\ 5) 17-4x-x+5\\ 6) 3-4(5x-6)\\ 7) \frac{3x}{2}+\frac{4x}{5} \qquad $(Make an entire fraction)$\\ 8) 0.06*0.3 \qquad $ (No calculator)$\\ 9) 0.06\div 0.2 \qquad $ (No calculator)$\\ 10) 3x^2+2x+5\\11) \frac{5x+2}{6y}\times 9xy^2