$-2x^2+3x+3$
$5\int_0^2\left(3x\right)dx$
$\int\left(\frac{1}{2}x^2\right)dx$
$\int\left(sec^2x-1\right)sec\left(x\right)\:tan\left(x\right)dx$
$7xy^2-6x^2y+4xy^2+x^2y$
$3x-13=x-7$
$\frac{sin\:a}{1+cos\:a}=\frac{1-cosa}{sina}$
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