$\left(\sin\left(x\right)+\cos\left(2\right)\right)^2$
$3x^2\cdot5x^2$
$\int x\sqrt{x+11}dx$
$\left(x+1\right)\left(x+5\right)$
$3x^2-30x+70$
$sin\left(\frac{n\pi x}{l}\right)sin\left(\frac{m\pi x}{l}\right)$
$7 x + 3 \geq 5$
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