$-6.5+x=-8.194$
$\int\frac{\left(sinh\left(3x\right)\right)}{\sqrt{cosh^2\left(3x\right)+4}}dx$
$91^2\:-14^2$
$312.5-254.2$
$\frac{1}{\cot\left(x\right)}-\frac{\sec\left(x\right)}{\csc\left(x\right)}=\cos\left(x\right)$
$2x+3=-17$
$cos\left(\pi x+\pi\right)$
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