$\int\left(\frac{u}{19}+\frac{v}{19}\left(xy\right)\right)dx$
$( a ) ( 3 a - x ^ { 2 } )$
$6x-3\left(-5x+3\right)=-114$
$5x^2+7x+2$
$5ab+1;\:a=2;\:b=-1$
$27-24x+4x^2$
$\int_0^x\:e^{\left(-t^2\:\right)}\:dt$
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