$2x^2\:-4$
$\int x^4\left(5x^5+5\right)^9dt$
$\left(-9+2b+c\right)^2$
$18p^3q^4,\:6p^2q^3$
$\int\left(\frac{cos^2x}{cos}\right)dx$
$-7\cdot7\cdot7\cdot7\cdot7\cdot7$
$\sec\left(y\right)=8x^2+5x+2\:$
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