$\left(5b-2c\right)\left(5b+2c\right)$
$\frac{4x^4+9x^3+9x^2+5x+6}{-7+x}$
$x^2\cot\left(x\right)^3\csc\left(x\right)^3$
$\left(11x^{9}y^{5}\right)^{2}$
$3\left(-2\right)^3+13$
$-14d\:+\:7\:=\:9\left(2d\:+\:15\right)$
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