$0.09a^6-0.6a^3+1$
$4a^2x^2-25x^2$
$5x+3\text{si}x=-3$
$\left(8y-4\right)\left(7y+5\right)$
$\frac{dy}{dx}2\sin\left(2y\right)\cos\left(x\right)=4$
$3\log2\left(4\right)$
$\tan\left(\frac{x}{2}\right)\csc\left(x\right)=\frac{1}{1+\cos\left(x\right)}$
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