Multiplying fractions πx3×sin(x)sin(x)+cos(2x)\frac{\pi x}{3} \times \frac{\sin\left(x\right)}{\sin\left(x\right)+\cos\left(2x\right)}3πx×sin(x)+cos(2x)sin(x)
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15a2−6ab−8a2+20−5ab−31+a2−ab15a^2-6ab-8a^2+20-5ab-31+a^2-ab15a2−6ab−8a2+20−5ab−31+a2−ab
2x−5x+9x2x-5x+9x2x−5x+9x
x2+3x+94x^2+3x+\frac{9}{4}x2+3x+49
9a−3a+5a9a-3a+5a9a−3a+5a
−x−x-x-x−x−x
−3x−9+15x-3x-9+15x−3x−9+15x
Two algebraic expressions are equivalent if they stay equal to each other, for any values their variables can take.
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