Like terms

Simplify: $4x^{3}\times6x^{3}$

Simplify: $16x^{4}\div4x^{2}$

Simplify: $2x^{2}+8x-5x^{2}-5x$

Simplify: $2x\times7x$

Simplify: $8x+4y-x-5y$

Consider the expression: $3x^{2}-2x-1$ (a) How many terms does it have? (b) Write down the coefficient of x. (c) Write down the constant term. (d) Is $5x^{2}+3a$ monomial? Explain.

Simplify: $7x+6y-2x+6y$

Simplify: $5x^{2}+2x-3x^{2}+6x$

Simplify: $3x^{2}+3x+2x^{2}-6x$

Simplify: $6x^{2}+4x+x^{2}+4x$

Simplify: $2x^{2}+9x+2x^{2}-5x$

Simplify: $7x+8y+4x-2y$