$f\left(x\right)=\left(4x^3+1\right)\left(x^2+4\right)^3$
$-k+4k$
$\left(3a+10b\right)\left(3a-7b\right)$
$\int\frac{\cos^3\left(x\right)}{\sec^6\left(x\right)}dx$
$x^2+8x-7>0$
$225x^2-360x+144=0$
$-1^3$
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