$-\frac{1}{2}\int xdx$
$4r^2-20rt+25t^2$
$2y+5e^x=\sec\left(2x+1\right)$
$76-43-54+87+91$
$64x^2+64x=9$
$\frac{\left(4x^3-2x+5\right)}{\left(x-1\right)}$
$\int\cos^3\left(\frac{1}{3}x\right)dx$
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