Question : Simplify the given expression.
$(5x + 8y)(25x^2 + 64y^2 - 40xy)$

Option 1: $125x^3-512y^3$

Option 2: $25x^3+64y^3$

Option 3: $125x^3+512y^3$

Option 4: $25x^3-64y^3$

Question : Simplify the given expression.
$\frac{1+\sin^4 \theta+\cos^4 \theta}{\cos^2 \theta+\sin^4 \theta}$

Option 1: 3

Option 2: 1

Option 3: 2

Option 4: 4

Question : Simplify the given expression.
$\frac{(326+222)^2-(326-222)^2}{(326 \times 222)}$

Option 1: 1

Option 2: 4

Option 3: 3

Option 4: 2

Question : Simplify the following expression.
$(4 x + 1)^2 - (4 x + 3)(4 x - 1)$

Option 1: $(4 x + 1)$

Option 2: $4$

Option 3: $(4x- 3)$

Option 4: $4x$

Question : Simplify the given expression.
15 – (–5)  × {4 – (7 – 3)}  ÷ [3 × {5 + (–3)  × (–6)}]

Option 1: 21

Option 2: 15

Option 3: 88

Option 4: 125

Question : Simplify the following expression.
2 + (30 – 26)² ÷ 8^{{3 – 2}} × 0.5

Option 1: 2

Option 2: 1

Option 3: 3

Option 4: 0