$21m-63n$
$-1024+-256$
$24x^3y^5+36x^2y^6-72x^4y^3$
$5x^2-30x+10$
$7\sin^2\left(x\right)+2\cos^2\left(x\right)=7$
$\int\frac{9}{\sqrt{t^2-4}}dt$
$\log_x\left(2x+15\right)=2$
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