Expand and simplify the given expression

$\left(x+3\right)\left(x+4\right)$

Expand and simplify the given expression

$\left(x+2\right)\left(x+6\right)$

Expand and simplify the given expression

$\left(s+1\right)\left(s+15\right)$

Expand and simplify the given expression

$\left(t+4\right)\left(t+2\right)$

Expand and simplify the given expression

$\left(v+8\right)\left(v+1\right)$

Expand and simplify the given expression

$\left(w+4\right)\left(w+5\right)$

Expand and simplify the given expression

$\left(y+7\right)\left(y+2\right)$

Expand and simplify the given expression

$\left(z+2\right)\left(z+2\right)$

Expand and simplify the given expression

$\left(x-1\right)\left(x+2\right)$