$\left(1-x\right)^2-\left(1+x\right)^2$
$\int\frac{\sec\left(y\right)^2}{\tan\left(y\right)}dy$
$x^2+16x=91$
$6\left(-2\right)^2$
$z^2+2z-63$
$10ab+5ab+8a+4$
$\int\frac{x}{\sqrt{x^2-8x+12}}dx$
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