$\left(s+4\right)^2$
$15ab-10b-60a+40$
$\frac{\sec^2\left(x\right)}{\sec2\left(x\right)-2}$
$\left(2x^2-8x+8\right)\left(x+3\right)$
$3x^2-18x+6$
$\sin\left(\frac{3x}{4}\right)\csc^4x+2csc^4x-\sin\left(\frac{3x}{4}\right)=2$
$\left(-3\right)\left(7\right)\left(-2\right)$
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