$\frac{15a^{2}b^{3}-9ab}{3ab}es$

$\frac{d^2}{dx^2}9sin\left(x\right)+x^2cos\left(x\right)$

$\int-\frac{\cos\left(x\right)}{x}dx$

$\left(1+x^{2}y^{2}\right)y+\left(xy-1\right)^{2}xy^{2}=0$

$1-\frac{\cos\left(^2\right)}{1+\sin\left(q\right)}=\sin\left(q\right)$

$49x^2+x+25$