$\int\frac{x^3+3x}{\sqrt{7-x^2}}dx$
$12^2-1^3$
$960^2-750^2$
$\frac{8}{12}-\frac{20}{30}$
$\cos^5\left(x\right)=\left(1-2\sin^2\left(x\right)+\sin^4\left(x\right)\right)\left(\cos\left(x\right)\right)$
$3\cdot10+8-4^2$
$3x^2-21x+36$
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