Question

Simplify the expression.
1. 3y-(6y+2)(-y)
2. (-7x+^2)(-x)+x^2
3. 3y/2 divide by 2/7
4. -x/4 divide by 6/x

I couldn't do any of these. Please explain..
Thanks!
Number two should look like this:
(-7x+x^2)(-x)+x^2

Also, I gave it another try and this is what I got (only for number 1 and 2):
1. y-6y^2
2. 8x^2+(-x^3)

Please check and help out with #3 and #4.. :)

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