$15.42-87.23$
$\frac{25a^2-121}{5a-11}$
$18x^3y^2,12x^2$
$x^2-3x-28\ge0$
$20a^{x+1}-54a^{x-1}$
$x^2-x+72$
$\int\left(-3x^2sin\left(x\right)\right)dx$
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