$\sin30+\sin45=\sin75$
$\left(6a^2+4\right)\left(6a^2-4\right)$
$2^1+2^5$
$\left(5-y\right)y=6$
$\int e^{5t}\cdot\cos\left(4t\right)dt$
$\left(x+6\right)\left(3x+1\right)$
$csca-sena=cota$
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