Subtraction of terms

Q.

Subtract $3\mathrm{a}(\mathrm{a}+\mathrm{b}+\mathrm{c})-2\mathrm{b}(\mathrm{a}-\mathrm{b}+\mathrm{c})$ from $4\mathrm{c}(-\mathrm{a}+\mathrm{b}+\mathrm{c})$.

Q. From the sum of $5p^2+6pq-7q^2$, $4pq+5q^2$ and $2p^2-3pq$ subtract the sum of $p^2+3pq$ and $4pq+5q^2$.

1. $6p^2+pq+7q^2$
2. $6p^2-7q^2$
3. $6p^2-pq+7q^2$
4. $6p^2+7q^2$

Q. The sum of two expressions is $9x^2+4xy-7y^2$. If one of them is $6x^2+5xy-12y^2$, find the other expression.

1. $x^2-xy+5y^2$
2. $3x^2+xy+5y^2$
3. $3x^2-xy+y^2$
4. $3x^2-xy+5y^2$

Q. Subtract $5mn+9m+8n$ from $16m+7n+12mn$.

1. $7m+n+7mn$
2. $7m-n+7mn$
3. $m-n+7mn$
4. $7m-n+mn$

Q. You bought $4x$ oregano sachets and $5y$ chili sachets, respectively. You also brought 5 loose sachets. Which of the following expressions represents the number of items you have bought?

1. $4x+5y$
2. $5(4x+5y)$
3. $4x+5y+5$
4. $4x+5y-5$

Q.

Subtract:

$16{\mathrm{x}}^2$ from $-8{\mathrm{x}}^2$.

Q. Simplify the given expession:
$(4y^3+2y^2-y+9)-(y^3-5y^2+3)$

1. $3y^3+7y^2-y+6$
2. ​​​$3y^3+7y^2-y-6$
3. ​​​$3y^3-3y^2-y+6$
4. ​​​$3y^3-3y^2-y+12$