$m^4+2m^2+9$
$\left(-3\right)\:-\:1\:-\:\left(-5\right)\:-\:\left(-2\right)$
$\left(tan\:x\:+cot\:x\right)\:to\:sec^2x\:+csc^2x$
$\left(+24\right)-\left(+1\right)$
$3t+2t^2$
$\left(-7n-7\right)^2$
$56x^2y^3z^3-21x^4y^2z^2+28x^3y^4$
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