Can anyone solve these problems?

Question

1. 5-58-7×58-(-58) 

2. 6² ÷y²+4+3 

3. 49r²+56rs+16r² 

4. 4t5+ 9t³ 

5. 30×2 +91×-30

Answer 1

1)

Use BODMAS rule to simply the equation.

First remove the brackets.

Next operation is multiplication.

Next operation is addition.

Next operation is subtraction.

Answer 2

2)

First operation is division.

Next operation is addition.

Comments

The expression is

From PEMDAS rule, first operation is exponents.

Second operation is division.

Next operation is addition.

= .

Answer 3

3) The expression is 

.

Answer 4

4) 4t^5 + 9t^3

= t^3 (4t^2 + 9)

4t^5 + 9t^3 = t^3 (4t^2 + 9)

Answer 5

5)

Use BODMAS rule to simply the equation.

First operation is multiplication from left to right.

Remove brackets.

Next operation is subtraction.