$x^2+8x-65=0$
$2\tan\left(x\right).\cos^2\left(x\right)+1$
$qx\:+\:qx\:+\:8\:+\:8$
$11b+9b$
$\left(-7\right)^9$
$12x=480$
$\left(a+b\right)^2=a^2-2ab+b^2$
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