$tan^2\theta\:+4tan\theta\:-21=0$
$\left(m^2-n\right)\left(m^2+n\right)$
$-6\left(-6+a\right)+8$
$\int e^{6x}sin\left(bx\right)dx$
$3x^2-x-4=0$
$-\frac{1}{11}x^4y^2-x^4y^2$
$\int_6^3\:\left(x^2e^x\right)dx$
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