$100a^2-4ab+4b^2-4$
$\int\:\:cos^3\:u\:sen^2\:u\:du$
$4x^2+8x^2+4$
$2z^2+8z-24$
$a^2dx=x\sqrt{x^2-a^2dy}$
$4+20b+25b^2$
$\int_{-1}^2\left(6x\right)dx$
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