Multiply the following rational expressions. Show complete solution
1. 2x / x^2-7x+12 • x^2-9 / 6x^2
2. 5x / x^2+5x+6 • x^2-4 / 10x
3. x^2+x-6 / x^2-11x+35 • x^2+10x+25 / 3x^2-14x-5
4. 3x^2-8x-3 / x^2-25 • x^2+10x+25 / 3x^2-14x-5
5. 2x^2+5x-12 / x^2-16 • x^2-8x+16 / 2x^2-13x+15​