$3x^2+5x^3-7x^2+9x^2+3z^2-x-5x^3$
$2x^2+13x+6$
$\frac{3+\sec^2\left(x\right)}{\sec\left(x\right)}$
$\left(\sqrt{8}\:m^4\:n^3\:o^2\:p\right)^2\:$
$\left(6a-4b+3\right)^2$
$\int x^4\left(x^5-2\right)^9dx$
$-5k\:-\:6\:+\:9k\:+\:19$
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