$\sqrt{2x-5=5}$
$4a-7a$
$\left(2y-5\right)\left(2y+6\right)$
$-3t^2+21t-22$
$4x^2-8x-3=0$
$\int\left(\frac{3-x}{3x^2-2x-1}\right)dx$
$\int\cos4x\left(1-\sen4x\right)^{3}dx$
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