algebra please help!

I need help understanding how to do these problems. Thanks!

1) Find the value(s) that would be left out of the range of f. If there is more than one value separate them by commas. Leave fractional answers in fraction form. If there are no values left out of the range respond by typing "none".

f(x) = (x^2+4x-12)/(4x^2+12x-72)

2)Find the y-intercept of f. Write the y-intercept as an ordered pair in simplified form. If there is more than one y-intercept separate each ordered pair by a comma. Write all fractional answers as fractions. If there is not a y-intercept respond by typing "none".

f(x) = (6x-3)/(2x+1)

3)Find the equation for any vertical asymptote(s) of f. Leave any fraction answers in fractional form.

f(x) = (8x^2+3x)/(2x^2-3x)

4) Find the x-intercept of f. Write the x-intercept as an ordered pair. If there is more than one x-intercept separate each ordered pair by a comma. Write all fractional answers as fractions. If there is not an x-intercept respond by typing "none".

f(x) = 4/(x-6)

5) Find any holes of the graph of f. Write the hole(s) as an ordered pair in simplified form. Leave fraction answers in fraction form. If there is more than one hole separate each ordered pair by a comma. If there is not any holes in the graph of f respond by typing "none".

f(x) = (x^2+x-12)/(x^2+3x+2)

6)List any values that are left out of the domain for f. Leave any fractional answers in fraction form. If there is more than one value separate them by commas.

f(x) = (x^2-4x-5)/(x^2-8x+15)

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