$2xy-3x=0$
$\int\left(3sin\left(7x\right)\right)dx$
$3x^2-\left(4x-7x^2\right)+\left(x+2\right)^2$
$-32x^4+16x^2+8$
$cos2\:x\:tan'\:x\:+\:cos2\:x\:-\:1cos2\:x$
$a^2+4a-12=0$
$n^2-3n-60$
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