$108x^4y^4-81x^7y^3-36xy^5$

$x^2-7x+10;\:x=1$

$\frac{y}{x}dx+\left(-1+\ln\left(y\right)-\ln\left(x\right)\right)dy=0$

$1+128^{14}$

$3x^2+3y^2=2x^2$

$\csc\left(x\right)^2-\cos\left(x\right)\sec\left(x\right)=\cot\left(x\right)$

$3e^xtgy\cdot\:\:dx\:+\:\left(2-e^x\right)sec^2y\cdot\:\:dy=0$