$\left(-\frac{7}{6}x^2\:-\:\frac{11}{2}y\right)^2$

$3x^2+5=8x$

$\frac{1-\tan\left(y\right)}{\csc\left(y\right)-\sec\left(y\right)}=\sin\left(y\right)$

$\int\cos5xe\sin5xdx$

$\left(3x^2+y^{3n}\right).\left(3x^2-y^{3n}\right)$

$\tan\left(x\right)+1-\cos\left(x\right)=\tan\left(x\right)+1$

$\int_4^2\left(1200x\right)\sqrt{5+4x}dx$