$\int\cos\left(\frac{t}{2}\right)^4dt$
$x^2+1ax+a^2+b^2$
$\int9x^4y^5dy$
$y=\left(\frac{2x}{x^2-1}\right)^3$
$169-1.96$
$x^2+81x-36$
$\left(-3+2\right)-\left(7-2\right)$
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