Expand (3m + 5)²

Factorise the following by taking out the common factor (ax + ay) + (bx + by)

Factorise the following by taking out the common factor a³− 3a² + a −3

Factorise :(7y²- 19y- 6)

Pick out the like terms from the following.

The sides of a triangle are 2x - 5y + 9, 3y + 6x -7 and -4x + y +10. Find perimeter of the triangle.

The length of a log is 3a + 4b - 2 and a piece (2a - b) is remove from it. What is the length of the remaining log?

Multiply (m⁴+ n⁴) and (m - n)

Are the following correct?
\(\cfrac { { 10m }^{ 4 } }{ 10{ m }^{ 4 } } =0\)

4m²n + 9n²m + 3mn \(\div \)4mn