Factor Completely: x2-5xy-6y2

Simplify: (-4a0)(2a4)(3a-7)

Factor Completely: x3+x

Multiply and Simplify: (x-y)2

Simplify: (-5a-3)(4b-4)(a-3)(b6)

Multiply and Simplify: (4a2-13bc2)(4a2+13bc2)

Factor Completely: x2+x-12

Factor Completely: 3×2-x-2

Write in Scientific Notation:0.64

Simplify: (-5a7b3c3)(9a2b6c)