$2\sin\left(x\right)\cdot\cos\left(x\right)=\sin\left(x\right)$

$f\left(x\right)=x^{-\frac{1}{5}}\sin^3\left(x\right)\ln\left(x\right)$

$\sin\left(x\right)\left(e^{-y}\right)dx=\left(1+\cos\left(x\right)\right)dy$

$36b^2-24b-16$

$tanx\:=-\frac{15}{49}\:$

$-40+15+10-80$

$-\left(x+4y-43\right)+\left(-8x+3y-6\right)$