$\frac{dy}{dx}=\frac{x}{\sqrt{7x+4}}$

$-5\:.\:\left(-3-2\right)+2\:.\:\left(12-13\right)\:-\:\left(-9\right)$

$\left(2a-b^x\right)\left(2a+b^x\right)$

$2pq+3p-12p-15q-7pq-13p$

$\frac{\left(\frac{1}{\sin\left(x\right)\cos\left(x\right)}\right)}{\frac{1}{\cos\left(x^2\right)}}$

$9x-7=29$

$29+-332+16$