$7-\left(-19\right)$
$\left(\frac{1}{5}b^2-c\right)\left(\frac{1}{5}b^2+c\right)$
$\int_{-2}^0\left(\frac{1}{1+x^2}\right)dx$
$\left(3r+5\right)-\left(2r+4\right)$
$\left(2\:x\:10.95\right)\:+\:\left(3\:x\:7.50\right)\:+\:\left(2\:x\:5.00\right)\:+\:\left(5\:x\:18.99\right)$
$\int\left(x+1\right)^2\:e^x\:dx$
$\sin\left(a\right)\cdot\sec\left(a\right)=\csc\left(a\right)$
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