$\int\frac{4y+6}{2y+1}dy$
$\frac{x^4+x^3-10x^2+5x-24}{x^2+2}$
$\left(-3x^6+y\right)\left(-2xy^7\right)$
$\left(y^2+6y+9\right)\left(2-5y\right)$
$18+x=27$
$-7\cdot105$
$\cos a\sec a=1$
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