$-\:4\:\left(\:4\:-\:5\:+\:2\:\right)\:-\:3\:-\:\:\left\{1\:-\:\left[\:6\:+\:\left(\:-\:3\:-\:1\:\right)\:-\:\left(\:-\:2\:+\:4\:\right)\:\right]\:+\:3\:-\:4\:\right\}$
$z^4+6z^2+9$
$\int\frac{1}{\left(x+3\right)^2-25}dx$
$\int\left(\tan\left(y\right)\sec\left(y\right)\right)dy$
$3^{x-z}=27$
$\:3n^2+5n+2n^3+8n$
$20y^22$
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