$100c^2-80cd+16d^2$
$\int\frac{\sqrt{16+x^{2}}}{t^{2}}dt$
$\left(1-\cos^2\left(a\right)\right)-\left(1-\sin^2\left(a\right)\right)$
$\lim_{x\to a}\frac{x-a}{\sin\left(x-a\right)-2x+2a}$
$y^2+y+1=0$
$\left(z^2+8\right)\left(4-z^2\right)$
$sen\left(x\right)+c=cos\left(y\right)+c$
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