(3+7x)-(16x2+15x2)

(3+1x)-(12x+16+0+18x2)

Q4: (15+13x2+14x2)+(13x+18x)

Q5: (2x2+1+15x2+7+3)+(0x+17x)

Q6: (18x+3)+(17x2+1x2+9+8+0x)

Q7: (6x + 14) - (9x + 5)

Q8: (14x2 + 13x + 12) - (7x2 + 20x + 4)

Q9: Subtract -10x2 + 16x - 15 from -6x2 + 19x + 19

Q10: From 19x2 + 11x + 15 subtract -5x2 - 6x - 6

: (-18x2 + 4x - 16) - (15x2 + 4x - 13)

Q12: [(6x + 10) - (17x + 10)] + [10x (4x + 2)]

Q13: [(20x2 - 17x + 8) - (-7x2 + 17x + 8)] + [(-8x + 1) (-4x)]

Q14: [(8) (5x2 + 7x + 6)] + [(-17x + 13) (19x + 9)]

Q15: [(4x + 11) (12x - 11)] + [(-8x2 - 8x - 9) + (-8x2 - 7x + 6)]

he's still waiting to this day..

To solve these algebraic expressions, we can follow the order of operations, which is also known as PEMDAS (Parentheses, Exponents, Multiplication and Division from left to right, Addition and Subtraction from left to right).

Q1: (3+7x)-(16x^2+15x^2)
To simplify this expression, we first distribute the negative sign inside the parentheses.
3+7x-16x^2-15x^2
Now, we combine like terms by adding the coefficients of like terms.
-31x^2 + 7x + 3

Q2: (3+1x)-(12x+16+0+18x^2)
Similar to the previous expression, first distribute the negative sign inside the parentheses.
3+1x-12x-16-0-18x^2
Now, combine like terms by adding the coefficients of like terms.
-18x^2 - 11x - 13

Q3: (15+13x^2+14x^2)+(13x+18x)
Combine like terms by adding the coefficients of like terms.
27x^2 + 31x + 15

Q4: (2x^2+1+15x^2+7+3)+(0x+17x)
Combine like terms by adding the coefficients of like terms.
17x^2 + 17x + 11

Q5: (18x+3)+(17x^2+1x^2+9+8+0x)
Combine like terms by adding the coefficients of like terms.
18x + 19x^2 + 20

Q6: (6x + 14) - (9x + 5)
To solve this expression, we distribute the negative sign inside the parentheses.
6x + 14 - 9x - 5
Combine like terms by adding or subtracting the coefficients of like terms.
-3x + 9

Q7: (14x^2 + 13x + 12) - (7x^2 + 20x + 4)
Distribute the negative sign inside the parentheses.
14x^2 + 13x + 12 - 7x^2 - 20x - 4
Combine like terms by adding or subtracting the coefficients of like terms.
7x^2 - 7x - 8

Q8: Subtract -10x^2 + 16x - 15 from -6x^2 + 19x + 19
To subtract one expression from another, we change the signs of the second expression and then add the two expressions.
(-6x^2 + 19x + 19) + (-(-10x^2 + 16x - 15))
Simplify by removing the negative sign.
-6x^2 + 19x + 19 + 10x^2 - 16x + 15
Combine like terms by adding or subtracting the coefficients of like terms.
4x^2 + 3x + 34

Q9: From 19x^2 + 11x + 15 subtract -5x^2 - 6x - 6
Subtract by changing the signs of the second expression and then adding the two expressions.
(19x^2 + 11x + 15) + (-(-5x^2 - 6x - 6))
Simplify by removing the negative sign.
19x^2 + 11x + 15 + 5x^2 + 6x + 6
Combine like terms by adding or subtracting the coefficients of like terms.
24x^2 + 17x + 21

Q10: (-18x^2 + 4x - 16) - (15x^2 + 4x - 13)
In this case, we have two sets of parentheses being subtracted.
Distribute the negative sign inside the second set of parentheses.
-18x^2 + 4x - 16 - 15x^2 - 4x + 13
Combine like terms by adding or subtracting the coefficients of like terms.
-33x^2 + 13