$x^{m^2+m-3}-2x^{\frac{n}{5}}y^{m+1}+3y^{\frac{n}{5}+4}$
$22y^2-49y+27$
$\int cos^7\left(\frac{x}{a}\right)dx$
$\left(2a^2-2b^2\right)$
$\frac{8x}{3}\left(1+x\right)+3$
$9x+27=-9$
$\left(3-8\right)\cdot\left(-2.5\right)$
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